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Advisory record · RUSTSEC-2026-0405

Out-of-bounds read with an out-of-range `InBuffer::pos`

No CVSS score

Published by OSV at 16 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
zstd-safecrates.io>=7.2.2, <7.4.0 || >=8.0.0-0, <8.2.07.4.0, 8.2.0
Identifiers
RUSTSEC-2026-0405
Published
16 Oct 2026
Updated
2 Nov 2026

Machine-written summary

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

Versions 7.2.2 up to but not including 7.4.0, and 8.0.0 up to but not including 8.2.0, of the zstd-safe crate are affected. In these versions, safe code that sets the public pos field of InBuffer past the end of the input can cause an out-of-bounds read during seekable compression, and the memory read past the input is compressed into the output. Upgrade to zstd-safe 7.4.0 or 8.2.0. The source gives few details about the exact conditions beyond this.

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.