VDB
DEBIAN-CVE-2026-28802
DEBIAN-CVE-2026-28802
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Record from OSV · Published March 6, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| python-authlib | Debian:14 | 1.6.7-1 |
Risk scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | python-authlib | 0, 1.6.0-1, 1.6.0-1+deb13u1 |
| Debian:14 | python-authlib | 0, 1.6.0-1, 1.6.1-1 |
Timeline
- Mar 6, 2026 CVE Published
- Oct 1, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
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vulnetix vdb fixes DEBIAN-CVE-2026-28802Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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