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Advisory record · RUSTSEC-2026-0262

`append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency

No CVSS score

Published by OSV at 20 Aug 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
append-only-veccrates.io>=0.1.9, <0.1.10-00.1.10-0
Identifiers
RUSTSEC-2026-0262
Published
20 Aug 2026
Updated
20 Oct 2026

Machine-written summary

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

Versions of append-only-vec from 0.1.9 up to but not including 0.1.10-0 are affected. A published version depended on a malicious proc-macro1 package whose build script runs attacker code, so building that version can run malicious code. Upgrade to append-only-vec 0.1.10-0 and remove 0.1.9 if it is present.

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.