VDB
CVE-2026-28802
CVE-2026-28802
PUBLISHED
CVSS 7.699999809265137 HIGH
Authlib: Setting `alg: none` and a blank signature appears to bypass signature verification
EPSS 0.02% · 5.3th percentile
Risk Scores
CVSS 4.0
7.699999809265137
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
EPSS Score
0.02%
5.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | authlib | 1.6.5, 1.6.5, 1.6.5 |
| authlib | authlib | >= 1.6.5, < 1.6.7, 1.6.5, >= 1.6.5, < 1.6.7 |
Exploit Intelligence
- CIRCL seen: CVE-2026-28802 (circl-sighting)
- https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75 (circl)
- https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7 (circl)
- https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg (nist-nvd)
- oidc.ts (github-poc)
- oidc.ts (github-poc)
- oidc.ts (github-poc)
- oidc.ts (github-poc)
- oidc.ts (github-poc)
- oidc.ts (github-poc)
…and 3 more exploits
Timeline
- Mar 4, 2026 CVE Published
- Mar 6, 2026 CVE Updated
- Mar 6, 2026 EPSS Score
- Mar 6, 2026 PoC Published
- Mar 7, 2026 EPSS Score
- Mar 8, 2026 EPSS Score
- Mar 9, 2026 Security Advisory
- Mar 10, 2026 EPSS Score
- Mar 11, 2026 EPSS Score
- Mar 12, 2026 EPSS Score
- Mar 13, 2026 EPSS Score
- Mar 14, 2026 EPSS Score
References
- https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg url
- https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75 url
- https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-28802 advisory
- https://github.com/authlib/authlib package