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Advisory record · GHSA-8hxf-qr8p-62x4

zip: AES Entry HMAC Authentication Bypass on Premature EOF

CVSS 6.5 MediumEPSS 0.0015 · 4th percentile

Published by the GitHub Advisory Database at 29 Oct 2026, 16:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
zipcrates.io>=0.6.0, <9.0.09.0.0
Identifiers
GHSA-8hxf-qr8p-62x4 · CVE-2026-115906
Weakness (CWE)
CWE-354 · CWE-1284
Tags
Published
29 Oct 2026
Updated
29 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-8hxf-qr8p-62x4: The zip crate (crates.io) versions 0.6.0 up to, but not including, 9.0.0 can return AES-encrypted entries without verifying their authentication code when the archive ends before the declared compressed size, or when an entry has zero payload bytes. An attacker who does not know the password and can modify an archive can have altered plaintext accepted without any error, affecting password-bearing read paths. Upgrade to zip 9.0.0 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0015, the 4th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 26 Oct 2026, 16:30 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 14:24 UTC First seen by agentprime
  3. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.