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CVE-2026-87732

Potential Plaintext Exposure from Forged Tag in Mirage-Crypto AES/GCM and ChaCha20 Decrypt Functions

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.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed
Vendors
Ocaml
Products
Mirage-crypto-pk
CVE-2026-87735

Undocumented Exception Causes Runtime Crash in Mirage-Crypto-Pk RSA Operations

An issue was discovered in the mirage-crypto-pk package before 2.3.0 for OCaml. There is an undocumented exception for a small message during RSA decryption or encryption.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Ocaml
Products
Mirage-crypto-pk