Threats Tagged 'ghsa-gg9x-qcx2-xmrh'
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Threats Tagged 'ghsa-gg9x-qcx2-xmrh'
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GHSA-gg9x-qcx2-xmrh: joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)CVE-2026-49852 0 The joserfc library versions up to 1.6.7 accept attacker-forged HMAC-signed JWT tokens when the verification key is empty or None. This occurs because the library does not reject zero-length HMAC keys, allowing attackers to forge tokens without knowledge of a secret key. The vulnerability affects the HMACAlgorithm.sign and verify methods, which use the raw key directly without enforcing a minimum key length or rejecting empty keys. No patched release is currently available. Join the discussion | GCVE Database | 07/02/2026, 19:12:08 UTC Added: 07/02/2026, 22:56:59 UTC |
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