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Advisory record · GHSA-h9f2-fgp8-vc4h

Low-level GCM ignores the operation nonce

No CVSS score

Published by the GitHub Advisory Database at 9 Aug 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
dcrypt-algorithmscrates.io>=0.0.0-0, <2.0.02.0.0
Identifiers
GHSA-h9f2-fgp8-vc4h · RUSTSEC-2026-0238
Published
9 Aug 2026
Updated
12 Oct 2026

Machine-written summary

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

Versions of dcrypt-algorithms before 2.0.0 have a flaw in the low-level Gcm builder, which derived the nonce from the constructor instead of the value supplied per operation, so distinct nonces could be silently reused. The source does not describe what an attacker must do to exploit this. Upgrade to dcrypt-algorithms 2.0.0 or later, then identify keys that were used with affected versions, rotate them, and re-encrypt affected data, since the upgrade does not undo any nonce reuse that already occurred.

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

No source has published a CVSS score for this record yet.

  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 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.