CVE-2026-17500 ggml-org llama.cpp json-schema-to-grammar.cpp _visit_pattern null pointer dereference
A remote attacker can cause a denial of service in llama.cpp via a null pointer dereference in the JSON schema to grammar converter.
- 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-2026-17500?
CVE-2026-17500 is a medium-severity vulnerability in ggml-org llama.cpp, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in ggml-org llama.cpp d006858/e15efe0. This affects the function _visit_pattern of the file common/json-schema-to-grammar.cpp. The manipulation results in null pointer dereference. The attack can be launched remotely. The pull request to fix this issue awaits acceptance.
Which versions are affected by CVE-2026-17500?
How do I fix CVE-2026-17500?
No fix has been published for CVE-2026-17500 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-17500 being exploited?
There is no known exploitation of CVE-2026-17500 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-17500, GHSA-92r6-r5fj-xg82, UBUNTU-CVE-2026-17500.