CVE-2026-88647 Security feature bypass in n/a
Attackers can bypass hostname verification in GnuTLS to eavesdrop on communications using crafted certificates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-88647?
CVE-2026-88647 is a medium-severity vulnerability in n/a, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A hostname verification bypass in GnuTLS v3.8.13 allows attackers to circumvent the Common Name fallback mechanism and eavesdrop on communications via a crafted certificate.
Weakness: CWE-297
Which versions are affected by CVE-2026-88647?
How do I fix CVE-2026-88647?
Upgrade to a fixed version.
Is CVE-2026-88647 being exploited?
There is no known exploitation of CVE-2026-88647 in the wild and no public exploit code.
Sources
Also known as AZL-107445, DEBIAN-CVE-2026-88647, ECHO-4d78-972f-d59f, GHSA-2j2x-fffq-ff4q, ROOT-OS-DEBIAN-12-CVE-2026-88647, ROOT-OS-DEBIAN-13-CVE-2026-88647 and 1 more.