joserfc: joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) stan...
CVE-2026-49852 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:21263-1, released July 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| joserfc · Debian 14 | 1.6.8-1 | DEBIAN-CVE-2026-49852 | Jul 19, 2026 |
| python-joserfc · opensuse-leap 16.0 | 1.1.0-bp160.3.1 | OPENSUSE-SU-2026:21263-1 | Jul 6, 2026 |
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