CVE-2026-119283 joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119283?
CVE-2026-119283 is a high-severity vulnerability in authlib joserfc, published on 29 Oct 2026.
Official description
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.5, joserfc.jwe.decrypt_json() accepts a JWE General JSON Serialization recipients array without a count limit and calls decrypt_cek() for every entry. An unauthenticated attacker who can submit a JWE to an endpoint using an RSA key-management algorithm can choose the number of private-key decryption operations performed by one request. The verify_all_recipients option does not reduce this work because the affected loop processes every recipient before consulting that setting, allowing repeated requests to exhaust service CPU without affecting confidentiality or integrity. This issue is fixed in version 1.7.5.
Weakness: CWE-400
Which versions are affected by CVE-2026-119283?
How do I fix CVE-2026-119283?
No fix has been published for CVE-2026-119283 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119283 being exploited?
There is no known exploitation of CVE-2026-119283 in the wild and no public exploit code.