CVE-2026-88907 SAML ePPN Attribute Validation Bypass in TÜBİTAK ULAKBİM's UlakPDF
Attackers can bypass authentication in UlakPDF by exploiting incorrect SAML ePPN attribute validation, gaining unauthorized access to the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88907?
CVE-2026-88907 is a high-severity authentication bypass vulnerability in TÜBİTAK ULAKBİM UlakPDF, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect Authorization vulnerability in TÜBİTAK ULAKBİM UlakPDF allows Authentication Bypass.
This issue affects UlakPDF: through 09092026.
Weakness: CWE-863
Which versions are affected by CVE-2026-88907?
How do I fix CVE-2026-88907?
No fix has been published for CVE-2026-88907 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-88907 being exploited?
There is no known exploitation of CVE-2026-88907 in the wild and no public exploit code.
Sources
Also known as GHSA-974p-3f2w-mrv2.