# Sequoia PGP has Subtraction Overflow when aes_key_unwrap function is provided ciphertext that is too short

Advisory record · `GHSA-v6x3-9r38-r27q`

- **Identifiers:** `GHSA-v6x3-9r38-r27q` · `CVE-2025-67897` · `RUSTSEC-2025-0136`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-195](https://cwe.mitre.org/data/definitions/195.html)
- **Tags:** [CWE-195](https://agentprime.io/advisories/tag/cwe-195.md)
- **Published:** 14 Dec 2025
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Dec 2025, 06:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `sequoia-openpgp` (crates.io): affected `<2.1.0`; fixed in `2.1.0`

## 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

- 5.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H`, from CNA (mitre)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0035, the 29th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:17 UTC: First seen by agentprime
- 31 Oct 2026, 15:17 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-v6x3-9r38-r27q)

## Sources

- [GitHub Advisory Database: GHSA-v6x3-9r38-r27q](https://github.com/advisories/GHSA-v6x3-9r38-r27q)
- [OSV: GHSA-v6x3-9r38-r27q](https://osv.dev/vulnerability/GHSA-v6x3-9r38-r27q)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-67897>
- <https://bugs.debian.org/1122582>
- <https://gitlab.com/sequoia-pgp/sequoia>
- <https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26>
- <https://gitlab.com/sequoia-pgp/sequoia/-/commit/b59886e5e7bdf7169ed330f309a6633d131776e5>
- <https://rustsec.org/advisories/RUSTSEC-2025-0136.html>

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-v6x3-9r38-r27q>, 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-v6x3-9r38-r27q/>. Everything for agents: <https://agentprime.io/llms.txt>.