CVE-2026-88916 Admin Access Bypass via Header Fallback in TÜBİTAK ULAKBİM's UlakPDF
Attackers can bypass admin authentication via header fallback to gain privileged access in UlakPDF.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88916?
CVE-2026-88916 is a medium-severity authentication bypass vulnerability in TÜBİTAK ULAKBİM UlakPDF, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect Authorization vulnerability in TÜBİTAK ULAKBİM UlakPDF allows Privilege Escalation.
This issue affects UlakPDF: through 09092026.
Weakness: CWE-863
Which versions are affected by CVE-2026-88916?
How do I fix CVE-2026-88916?
No fix has been published for CVE-2026-88916 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-2026-88916 being exploited?
There is no known exploitation of CVE-2026-88916 in the wild and no public exploit code.
Sources
Also known as GHSA-6gp4-g9px-6pmh.