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Advisory record · RUSTSEC-2026-0328

`decompress`: tar-family extractors write archive entries without a path-traversal check (tar-slip)

CVSS 7.1 High

Published by OSV at 19 Sept 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
decompresscrates.io>=0.0.0-0No fixed version yet
Identifiers
RUSTSEC-2026-0328
Published
19 Sept 2026
Updated
3 Oct 2026

Machine-written summary

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

The decompress crate's tar-family extractors (.tar, .tar.gz, .tar.xz, .tar.bz2, .tar.zst) do not check archive entry paths for traversal, so a crafted archive can write files outside the destination directory. An attacker who supplies a malicious archive for extraction can thereby write arbitrary files on the system, subject to the extracting user's permissions. Affects all versions of decompress; no fixed version is listed, so no fix is available, and users should avoid extracting untrusted tar archives with it.

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
7.1 High 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H OSV
  • 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.