# CVE-2026-89086

## Summary

- **CVE ID:** CVE-2026-89086
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-347
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.

## Affected Products

- OCaml — jose (0)

## References

- [CNA](https://github.com/ulrikstrid/ocaml-jose/commit/cf17d991ec6a0d1997956b6c7799890f9c28879e)
- [CNA](https://osv.dev/vulnerability/OSEC-2026-19)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._