CVE-2026-104056
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductAuthlib
PublishedOct 1, 2026
First seenOct 1, 2026
Weakness typeCWE-345CWE-345CWE-346CWE-346CWE-829CWE-829
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Authlib Authlib | 1.7.2 | — |
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