CVE-2026-9096 CVE-2026-9096
Casdoor fails to validate SAML assertion time bounds, allowing attackers to use expired or future-dated assertions to bypass authentication and take over accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-9096?
CVE-2026-9096 is a high-severity authentication bypass vulnerability in Casdoor, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Casdoor versions 2.362.0 and earlier do not enforce SAML assertion time bounds. The gosaml2 library reports all time-validation results, including NotOnOrAfter and NotBefore, in the assertionInfo.WarningInfo field. However, ParseSamlResponse() never reads this field, meaning that time bounds are computed by the library but silently discarded before the user session is issued.
Which versions are affected by CVE-2026-9096?
3 open source packages ship an affected version, including github.com/casdoor/casdoor.
| Package | Affected | Fixed in |
|---|---|---|
github.com/casdoor/casdoor Go | All versions | None |
github.com/casdoor/casdoor Go | All versions to 1.1000.1-0.20260321120606-239e8bd69487 | None |
github.com/casdoor/casdoor Go | All versions to 1.1000.1-0.20260321120606-239e8bd69487 | None |
How do I fix CVE-2026-9096?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-9096 being exploited?
There is no known exploitation of CVE-2026-9096 in the wild and no public exploit code.
Sources
Also known as GHSA-rgq2-93gj-ffxg, GO-2026-5899.