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CVE-2026-72888 Affecting libnet-oauth-perl package, versions <0.32-1

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.55% (44th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-LIBNETOAUTHPERL-18860848
  • published17 Aug 2026
  • disclosed16 Aug 2026
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Introduced: 16 Aug 2026

CVE-2026-72888  (opens in a new tab)

How to fix?

Upgrade Debian:unstable libnet-oauth-perl to version 0.32-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libnet-oauth-perl package and not the libnet-oauth-perl package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.