Medium severity6.2NVD Advisory· Published Sep 9, 2026
CVE-2026-87732
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.
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Affected products
1- Range: <2.2.0
Patches
Vulnerability mechanics
References
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