CVE-2026-87732

Published: Sep 9, 2026Modified: Sep 9, 2026Deferred

6.2

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability: 2.5 / Impact: 3.6

Source: MITRE (Secondary)

Description

An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml. The AES.GCM.authenticate_decrypt_into and Chacha20.authenticate_decrypt_into functions write the decrypted plaintext into a caller-provided buffer and only then compares the tag. On a forged tag, the functions returns false, but the destination buffer already holds the full plaintext.

Related CWEs

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (2)

https://osv.dev/vulnerability/OSEC-2026-12

Source: cve@mitre.org

https://osv.dev/vulnerability/OSEC-2026-12

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.