Vulnerability-Lookup

CVE-2026-72888 (GCVE-0-2026-72888)

Vulnerability from cvelistv5 – Published: 2026-08-16 13:50 – Updated: 2026-08-17 16:21

Title

Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require

Summary

Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require. smart_require stores results in a process-global hash with no bound and no eviction, and keeps an entry for every class name it is asked about, including names that failed to load, because the return value of the failed eval is stored before the error is checked. The key comes off the wire on the server side: _signature_method_class builds the class name from the signature_method parameter of the incoming message, and verify resolves it before any signature is checked. A remote client chooses both how many entries are created and how long each key is. In a persistent server the hash grows for the life of the worker process until it exhausts memory. Header size limits bound the key length on the Authorization header path, but not on a POST body.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-17 16:21 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

CPANSec redhat root

References

4 references

URL	Tags
https://github.com/vurtdev/Net-OAuth/security/adv…	vendor-advisory
https://github.com/vurtdev/Net-OAuth/commit/ee713…	patch
https://metacpan.org/release/RRWO/Net-OAuth-0.32/…	release-notes
http://www.openwall.com/lists/oss-security/2026/08/16/4

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 0 , < 0.32 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-72888

Vulnerability from fkie_nvd - Published: 2026-08-16 14:16 - Updated: 2026-08-17 17:16

Severity

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

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/vurtdev/Net-OAuth/commit/ee713fc96263c70b3b9a5280612618b474576f8f.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/vurtdev/Net-OAuth/security/advisories/GHSA-m2cv-cq5x-47ph
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/RRWO/Net-OAuth-0.32/changes
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/08/16/4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Net::OAuth"
          ],
          "packageName": "Net-OAuth",
          "packageURL": "pkg:cpan/Net-OAuth",
          "programFiles": [
            "lib/Net/OAuth.pm",
            "lib/Net/OAuth/Message.pm"
          ],
          "programRoutines": [
            {
              "name": "Net::OAuth::smart_require"
            },
            {
              "name": "Net::OAuth::Message::_signature_method_class"
            }
          ],
          "repo": "https://github.com/vurtdev/Net-OAuth",
          "versions": [
            {
              "lessThan": "0.32",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
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      "lang": "en",
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    }
  ],
  "id": "CVE-2026-72888",
  "lastModified": "2026-08-17T17:16:50.813",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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    ],
    "ssvcV203": [
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}

ubuntu-cve-2026-72888

Vulnerability from osv_ubuntu

Published

2026-08-17 00:00

Modified

2026-08-17 00:00

Summary

Details

(Net::OAuth versions before 0.32 for Perl allow memory exhaustion via u ...)

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-72888	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-72888	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://github.com/vurtdev/Net-OAuth/security/adv…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.28-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.28-2?arch=source\u0026distro=bionic"
      },
      "ranges": [
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      ],
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    },
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      "ecosystem_specific": {
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          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.28-3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.28-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.28-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.28-4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-oauth-perl",
            "binary_version": "0.31-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libnet-oauth-perl",
        "purl": "pkg:deb/ubuntu/libnet-oauth-perl@0.31-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.31-1"
      ]
    }
  ],
  "aliases": [],
  "details": "(Net::OAuth versions before 0.32 for Perl allow memory exhaustion via u ...)",
  "id": "UBUNTU-CVE-2026-72888",
  "modified": "2026-08-17T00:00:00Z",
  "published": "2026-08-17T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-72888"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-72888"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/42733455/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vurtdev/Net-OAuth/security/advisories/GHSA-m2cv-cq5x-47ph"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-72888"
  ]
}

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-2026-72888 (GCVE-0-2026-72888)

FKIE_CVE-2026-72888

ubuntu-cve-2026-72888

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature