Memory Leak Affecting authentik-2026.5 package, versions <2026.5.7-r8


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (21st percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-AUTHENTIK20265-20554014
  • published7 Oct 2026
  • disclosed2 Oct 2026

Introduced: 2 Oct 2026

NewCVE-2026-104874  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Chainguard authentik-2026.5 to version 2026.5.7-r8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream authentik-2026.5 package and not the authentik-2026.5 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Multidict is an implementation of a multidict data structure. From 6.7.0 until 6.9.1, the C extension's items-view reflected union operation, operand | d.items(), in multidict_itemsview_or2_impl and subtraction operation, d.items() - operand, in multidict_itemsview_sub1_impl fail to release new key-identity and value references returned for each operand element. Applications that perform these operations over attacker-influenced sequences can leak two strong references per element, and garbage collection cannot reclaim them, so repeated operations can cause unbounded process memory growth and denial of service. Forward union, intersection, non-tuple operand elements, and pure-Python builds are not affected by this reference leak. This issue is fixed in version 6.9.1.

CVSS Base Scores

version 3.1