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CVE-2026-28802 Authlib: Setting `alg: none` and a blank signature appears to bypass signature verification

🗓️ 06 Mar 2026 06:44:26Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 28 Views

Authlib prior to version 1.6.7 failed to verify JWTs with alg none and an empty signature, now patched.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-28802
6 Mar 202606:44
attackerkb
Information Security Automation
March Linux Patch Wednesday
30 Mar 202620:00
avleonov
Chainguard
CVE-2026-28802 vulnerabilities
12 Mar 202607:17
cgr
Circl
CVE-2026-28802
4 Mar 202614:32
circl
CNNVD
Authlib 数据伪造问题漏洞
6 Mar 202600:00
cnnvd
CVE
CVE-2026-28802
6 Mar 202606:44
cve
Debian CVE
CVE-2026-28802
6 Mar 202606:44
debiancve
Github Security Blog
Authlib: Setting `alg: none` and a blank signature appears to bypass signature verification
4 Mar 202620:55
github
NVD
CVE-2026-28802
6 Mar 202607:16
nvd
OSV
CGA-9G93-FH97-JQMC
13 Mar 202615:25
osv
Rows per page
[
  {
    "vendor": "authlib",
    "product": "authlib",
    "versions": [
      {
        "version": ">= 1.6.5, < 1.6.7",
        "status": "affected"
      }
    ]
  }
]

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