CVE-2026-28802
Authlib: Setting `alg: none` and a blank signature appears to bypass signature verification
9.8
CRITICAL
CVSS 3.1
EPSS 0.43%
描述
Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application code when a failure was expected.. This issue has been patched in version 1.6.7.
如何修補 CVE-2026-28802
要修補 CVE-2026-28802,請將受影響套件升級到下列已修補版本。
- —升級至 1.6.7 或更新版本
- —升級至 1.6.7 或更新版本
CVE-2026-28802 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- >= 1.6.5, < 1.6.7
- >= 1.6.5, < 1.6.7
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P |
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |