Information Exposure Through Caching Affecting prism package, versions <5.16.0-r14


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.53% (43rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-PRISM-20514930
  • published6 Oct 2026
  • disclosed18 Sept 2026

Introduced: 18 Sep 2026

NewCVE-2026-93748  (opens in a new tab)
CWE-524  (opens in a new tab)

How to fix?

Upgrade Chainguard prism to version 5.16.0-r14 or higher.

NVD Description

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

http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.

CVSS Base Scores

version 3.1