CVE-2026-17501: ggml-org llama.cpp JSON-Schema-to-GBNF Conversion json-schema-to-grammar.cpp transform recursion

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-10-24
Weakness: CWE-404

Description

A flaw has been found in ggml-org llama.cpp e15efe0. This vulnerability affects the function transform of the file common/json-schema-to-grammar.cpp of the component JSON-Schema-to-GBNF Conversion. This manipulation causes uncontrolled recursion. The attack may be initiated remotely. The pull request to fix this issue awaits acceptance.

Affected products

ggml-org llama.cpp: e15efe0

References

https://github.com/ggml-org/llama.cpp/
https://github.com/ggml-org/llama.cpp/issues/25283
https://github.com/ggml-org/llama.cpp/pull/25308
https://vuldb.com/cve/CVE-2026-17501
https://vuldb.com/submit/798504
https://vuldb.com/vuln/383354
https://vuldb.com/vuln/383354/cti

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