CVE-2026-102275

A flaw was found in PyJWT. When importing an Octet Key Pair OKP private JSON Web Key JWK, the library does not verify that the public key component matches the private key component. In applications that accept private key parameters from proof headers, a remote attacker can exploit this...

joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)

Summary joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None. HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/rfc7518/jwsalgs.py:62-70 feed whatever OctKey.getopkey... produced into hmac.new..., and...