Is CVE-2026-87732 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-87732?

CVE-2026-87732 has a CVSS v3 severity of MEDIUM (6.2).

Back

CVE-2026-87732

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.