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Advisory record · GHSA-xcc6-f2jq-43x6

BLAKE2b produces wrong tag when using `reset()` with a different-length key

No CVSS score

Published by the GitHub Advisory Database at 30 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
orioncrates.io>=0.0.0-0, <0.17.16 || >=0.18.0-0, <0.18.10.17.16, 0.18.1
Identifiers
GHSA-xcc6-f2jq-43x6 · RUSTSEC-2026-0428
Published
30 Oct 2026
Updated
30 Oct 2026

Machine-written summary

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

The orion crate's BLAKE2b MAC implementation is affected in versions before 0.17.16 and from 0.18.0 up to 0.18.1. Calling reset() with a key of a different length than the one used at initialization produces an incorrect tag, so verification can fail even between honest parties; no attacker action is described. Upgrade to orion 0.17.16 or 0.18.1.

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.