CVE-2026-119283：joserfc is a Python library that provides an implementation of several
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.
漏洞详情
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.
风险评估
- CVSS 评分：7.5（HIGH）
- 评分版本：CVSS 3.1
- 攻击向量：
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
弱点类型
CWE-400
参考链接
- https://github.com/authlib/joserfc/commit/d6dc8df6c7609277e741069d3733e43996c1cd17
- https://github.com/authlib/joserfc/releases/tag/1.7.5
- https://github.com/authlib/joserfc/security/advisories/GHSA-jpxq-7h8p-2q76
数据来源：NVD（美国国家漏洞数据库），入库时按 CVSS 评分筛选。
原文链接： CVE-2026-119283：joserfc is a Python library that provides an implementation of several