Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N N N N H N 7.7 .0043 35.7 —
AFFECTED Product Versions Fixed authlib >= 1.6.5, < 1.6.7 – —
TIMELINE Mar 3 Reserved by GitHub_M Mar 6 Published (CNA: GitHub_M) Aug 17 EXPLOIT PUBLISHED — CVE-2026-28802 (authlib). Public exploit reference added.
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.
| Date | Event | Detail |
|---|---|---|
| March 3, 2026 | Reserved | Reserved by GitHub_M |
| March 6, 2026 | Published | Published (CNA: GitHub_M) |
| August 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-28802 (authlib). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| authlib | authlib | — | >= 1.6.5, < 1.6.7 | — |
Authoritative record: CVE-2026-28802 at cve.org
Vendors: authlib
Weaknesses: CWE-347
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-28802 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.