Vulnerability-Lookup

CVE-2026-82439 (GCVE-0-2026-82439)

Vulnerability from cvelistv5 – Published: 2026-09-14 14:00 – Updated: 2026-09-14 19:51

Title

Apache Storm DRPC: Unauthenticated Unbounded Memory Growth in DRPC

Summary

Description The DRPC server kept a map from function name to request queue and created an entry the first time a function name was seen. No code path ever removed an entry: request cleanup removed the request from its queue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of the process. Function names come from the client and are not constrained to functions any topology has registered, so the number of retained entries is bounded only by the number of distinct names an attacker chooses to send, and each retained entry holds the name itself. `drpc.authorizer` is unset by default, so no credentials are required to reach the endpoint. The retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC server exhausts its heap. Mitigation Upgrade to 3.1.0, where a function's queue is removed once nothing is waiting in it. Users who cannot upgrade immediately should configure `drpc.authorizer` so that only trusted principals can reach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:51 UTC

CWE

CWE-770 - Allocation of resources without limits or throttling

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/7sgzvv5lzz93jn6vy…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Storm DRPC	Affected: 3.0.0 , < 3.1.0 (semver)	guessed

Credits

The ASF using Claude Agents

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-82439

Vulnerability from fkie_nvd - Published: 2026-09-14 14:17 - Updated: 2026-09-14 20:58

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/7sgzvv5lzz93jn6vy74qfk105bhmkrzs
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/09/13/18

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  ],
  "id": "CVE-2026-82439",
  "lastModified": "2026-09-14T20:58:48.430",
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GHSA-Q5HQ-8Q75-R6F6

Vulnerability from github – Published: 2026-09-14 15:32 – Updated: 2026-09-14 21:31

Details

Description

The DRPC server kept a map from function name to request queue and created an entry the first time a function name was seen. No code path ever removed an entry: request cleanup removed the request from its queue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of the process.

Function names come from the client and are not constrained to functions any topology has registered, so the number of retained entries is bounded only by the number of distinct names an attacker chooses to send, and each retained entry holds the name itself. drpc.authorizer is unset by default, so no credentials are required to reach the endpoint.

The retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC server exhausts its heap.

Mitigation

Upgrade to 3.1.0, where a function's queue is removed once nothing is waiting in it.

Users who cannot upgrade immediately should configure drpc.authorizer so that only trusted principals can reach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks.

Credit

The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-82439"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T14:17:12Z",
    "severity": "CRITICAL"
  },
  "details": "Description\n\nThe DRPC server kept a map from function name to request queue and created an entry the first time a\nfunction name was seen. No code path ever removed an entry: request cleanup removed the request from its\nqueue, and the shutdown path drained queues, but the queue object and its map entry remained for the life of\nthe process.\n\nFunction names come from the client and are not constrained to functions any topology has registered, so the\nnumber of retained entries is bounded only by the number of distinct names an attacker chooses to send, and\neach retained entry holds the name itself. `drpc.authorizer` is unset by default, so no credentials are\nrequired to reach the endpoint.\n\nThe retained state is permanent rather than a transient load spike, so the effect accumulates until the DRPC\nserver exhausts its heap.\n\nMitigation\n\nUpgrade to 3.1.0, where a function\u0027s queue is removed once nothing is waiting in it.\n\nUsers who cannot upgrade immediately should configure `drpc.authorizer` so that only trusted principals can\nreach the DRPC endpoints, and should ensure the DRPC ports are not reachable from untrusted networks.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.",
  "id": "GHSA-q5hq-8q75-r6f6",
  "modified": "2026-09-14T21:31:37Z",
  "published": "2026-09-14T15:32:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82439"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/7sgzvv5lzz93jn6vy74qfk105bhmkrzs"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/13/18"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-82439 (GCVE-0-2026-82439)

FKIE_CVE-2026-82439

GHSA-Q5HQ-8Q75-R6F6

Tags

Sightings

Nomenclature