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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72888
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-16 14:16:54 UTC
Updated2026-08-16 17:17:41 UTC
DescriptionNet::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.

Risk And Classification

Problem Types: CWE-770 | CWE-770 CWE-770 Allocation of Resources Without Limits or Throttling

References

ReferenceSourceLinkTags
github.com/vurtdev/Net-OAuth/security/advisories/GHSA-m2cv-cq5x-47ph 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
www.openwall.com/lists/oss-security/2026/08/16/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
metacpan.org/release/RRWO/Net-OAuth-0.32/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/vurtdev/Net-OAuth/commit/ee713fc96263c70b3b9a5280612618b47457... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to Net-OAuth 0.32 or later.

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