Description
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.
Published: 2026-08-16
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to Net-OAuth 0.32 or later.

Tracking

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Advisories

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History

Mon, 17 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Vurtdev
Vurtdev net-oauth
Vendors & Products Vurtdev
Vurtdev net-oauth

Sun, 16 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
References

Sun, 16 Aug 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require
Weaknesses CWE-770
References

Subscriptions

Vurtdev Net-oauth
cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-08-17T16:21:57.584Z

Reserved: 2026-08-10T15:44:58.172Z

Link: CVE-2026-72888

cve-icon Vulnrichment

Updated: 2026-08-17T16:20:54.348Z

cve-icon NVD

Status : Received

Published: 2026-08-16T14:16:54.970

Modified: 2026-08-17T17:16:50.813

Link: CVE-2026-72888

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T19:00:05Z

Weaknesses