CVE•Published 2026-03-06•Modified 2026-07-01•1 article on news•7 live references•NVD data
CVE-2026-28802Authlib · Authlib
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
34
Exploit Prediction Scoring System · top 66% of all CVEs
Weaknesses (CWE)
Description
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.
Timeline
Published 2026-03-06
Modified 2026-07-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-28802Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Authlib Authlib"All exposed Authlib Authlib instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Authlib"HTTP body or banner mentions "Authlib" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-28802Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-28802Censys host search filtered to this CVE id.
grep.app
CVE-2026-28802Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-28802GitHub code search for direct mentions.
Google dork
"CVE-2026-28802" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.