Description
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| authlib | authlib | < 1.6.12, >= 1.7.0, < 1.7.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-authlib | 1.7.2-1 | — |
| Debian 13 | python-authlib | No fix yet | — |
| Debian 12 | python-authlib | 1.2.0-1+deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | python-authlib | No fix yet | — |
| Ubuntu 25.10 | python-authlib | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | python-authlib | No fix yet | — |
| Ubuntu Pro 24.04 LTS | python-authlib | No fix yet | — |
| Ubuntu Pro 22.04 LTS | python-authlib | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 3 | python-Authlib | 1.3.1-150600.3.22.1 | SUSE-SU-2026:2968-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-Authlib | 1.7.2-1.1 | openSUSE-SU-2026:10883-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | airflow-3 | 3.2.1-r2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | authlib | >= 1.7.0, < 1.7.1 | 1.7.1 | GHSA-r95x-qfjj-fjj2 |
| PyPI | authlib | < 1.6.12 | 1.6.12 | GHSA-r95x-qfjj-fjj2 |
Advisories 2
- SUSE-SU-2026:2968-1 Security update for python-Authlib SUSE / openSUSE Security Updates · Jul 15, 2026
- openSUSE-SU-2026:10883-1 python311-Authlib-1.7.2-1.1 on GA media SUSE / openSUSE Security Updates · May 29, 2026