CVE catalog
CVE-2026-104056
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all e
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-authlib | sid | 1.7.2-2 | vulnerable |
| Debian | python-authlib | forky | 1.7.2-2 | vulnerable |
| Debian | python-authlib | trixie | 1.6.0-1+deb13u1 | vulnerable |
| Debian | python-authlib | bookworm | 1.2.0-1+deb12u1 | vulnerable |
| Debian | python-authlib | bookworm-security | 1.2.0-1+deb12u2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-authlib | source | sid | (unfixed) | not yet assigned | Not reported | [1151845] |
| Debian | python-authlib | source | forky | (unfixed) | not yet assigned | Not reported | [1151845] |
| Debian | python-authlib | source | trixie | (unfixed) | not yet assigned | Not reported | [1151845] |
| Debian | python-authlib | source | bookworm | (unfixed) | not yet assigned | Not reported | [1151845] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-authlib]Affected
Source package: [python-authlib]
Details (4)
1.2.0-1+deb12u1· all · bookwormAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u1· all · bookwormAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u2· all · bookworm-securityAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u2· all · bookworm-securityAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
- [python-authlib-doc]Affected
Source package: [python-authlib]
Details (4)
1.2.0-1+deb12u1· all · bookwormAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u1· all · bookwormAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u2· all · bookworm-securityAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
1.2.0-1+deb12u2· all · bookworm-securityAffected
nvd · python-authlib · debian · bookworm; nvd · python-authlib · debian · 12
[Debian 13 (Trixie)]
- [python3-authlib]Affected
Source package: [python-authlib]
Details (2)
1.6.0-1+deb13u1· all · trixieAffected
nvd · python-authlib · debian · 13
1.6.0-1+deb13u1· all · trixieAffected
nvd · python-authlib · debian · 13
- [python-authlib-doc]Affected
Source package: [python-authlib]
Details (2)
1.6.0-1+deb13u1· all · trixieAffected
nvd · python-authlib · debian · 13
1.6.0-1+deb13u1· all · trixieAffected
nvd · python-authlib · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-104056]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-104056]
- [https://security-tracker.debian.org/tracker/CVE-2026-104056]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-104056.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]