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Advisory record · RUSTSEC-2026-0307

`uncbv`: archive extraction is vulnerable to path traversal (zip-slip)

CVSS 7.1 High

Published by OSV at 23 Sept 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
uncbvcrates.io>=0.0.0-0, <0.3.10.3.1
Identifiers
RUSTSEC-2026-0307
Published
23 Sept 2026
Updated
24 Sept 2026

Machine-written summary

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

The uncbv crate, versions before 0.3.1, is vulnerable to path traversal during archive extraction. A user who extracts a malicious .cbv or .cbz archive can have files written outside the chosen output directory, because entry names containing ".." components or absolute paths are not checked. Upgrade to uncbv 0.3.1 or later, and only extract archives from trusted sources until then.

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.