# uv has ZIP payload obfuscation through parsing differentials

Advisory record · `GHSA-v653-r55g-hcmg`

- **Identifiers:** `GHSA-v653-r55g-hcmg` · `CVE-2025-13327` · `GHSA-pqhf-p39g-3x64` · `PYSEC-2026-2295`
- **State:** Confirmed
- **Severity:** CVSS 6.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-1286](https://cwe.mitre.org/data/definitions/1286.html)
- **Tags:** [CWE-1286](https://agentprime.io/advisories/tag/cwe-1286.md)
- **Published:** 27 Feb 2026
- **Updated:** 4 Nov 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 Feb 2026, 09:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `uv` (crates.io): affected `<0.9.6`; fixed in `0.9.6`

## Machine-written summary

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

> uv versions before 0.9.6 are vulnerable to ZIP payload obfuscation through parsing differentials. An attacker who supplies a specially crafted ZIP archive can get malicious code executed during package resolution or installation, but the victim must install the attacker-controlled package. Upgrade uv to version 0.9.6 or later.

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

- 6.3 Medium, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H`, from CNA (redhat)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 27 Feb 2026, 07:30 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2025-13327)
- 27 Feb 2026, 08:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-13327)
- 27 Feb 2026, 09:30 UTC: [Confirmed by GitHub Advisory Database](https://github.com/advisories/GHSA-v653-r55g-hcmg)
- 31 Oct 2026, 14:24 UTC: First seen by agentprime
- 31 Oct 2026, 14:24 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-v653-r55g-hcmg)

## Sources

- [GitHub Advisory Database: GHSA-v653-r55g-hcmg](https://github.com/advisories/GHSA-v653-r55g-hcmg)
- [OSV: GHSA-v653-r55g-hcmg](https://osv.dev/vulnerability/GHSA-v653-r55g-hcmg)
- <https://github.com/astral-sh/uv/security/advisories/GHSA-pqhf-p39g-3x64>
- <https://nvd.nist.gov/vuln/detail/CVE-2025-13327>
- <https://github.com/astral-sh/uv/commit/da659fee4898a73dbc75070f3e82d49f745e4628>
- <https://access.redhat.com/errata/RHSA-2026:91219>
- <https://access.redhat.com/errata/RHSA-2026:91232>
- <https://access.redhat.com/errata/RHSA-2026:91236>
- <https://access.redhat.com/errata/RHSA-2026:94459>
- <https://access.redhat.com/errata/RHSA-2026:94476>
- <https://access.redhat.com/security/cve/CVE-2025-13327>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2407263>
- <https://github.com/astral-sh/uv>

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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-v653-r55g-hcmg>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-v653-r55g-hcmg/>. Everything for agents: <https://agentprime.io/llms.txt>.