CVE-2026-17501: Uncontrolled recursion flaw in llama.cpp JSON-Schema-to-GBNF
llama.cpp
A flaw in the JSON-Schema-to-GBNF conversion component of llama.cpp allows remote attackers to trigger uncontrolled recursion. No exploitation has been confirmed yet.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 6.9
- EPSS
- 0.01 · top 46% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 27 Jul 2026
- last update
- 27 Jul 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-07-27CVE-2026-17501: A flaw has been found in ggml-org llama.cpp e15efe0.NVD · nvd.nist.gov/vuln/detail/CVE-2026-17501
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 27 Jul 2026 · first reported 27 Jul 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# CVE-2026-17501: Uncontrolled recursion flaw in llama.cpp JSON-Schema-to-GBNF https://gcdradar.vercel.app/incidents/cve-2026-17501-uncontrolled-recursion-flaw-in-llama-cpp-json · AIR-2026-1215 · closed 2026-07-27 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-07-27 - AI role: Attack on AI - Products: llama.cpp - CVE ids: CVE-2026-17501 - CVSS: 6.9 ## Summary A flaw in the JSON-Schema-to-GBNF conversion component of llama.cpp allows remote attackers to trigger uncontrolled recursion. No exploitation has been confirmed yet. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-07-27: CVE-2026-17501: A flaw has been found in ggml-org llama.cpp e15efe0. (https://nvd.nist.gov/vuln/detail/CVE-2026-17501) ## Sources - 2026-07-27 NVD: CVE-2026-17501: A flaw has been found in ggml-org llama.cpp e15efe0. https://nvd.nist.gov/vuln/detail/CVE-2026-17501 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
Related
- closed6.9llama.cpp CVE-2026-78148: llama.cpp RPC Server Null Pointer Dereference Vulnerability
Patch now · Disclosed · since 24 Aug 2026 · CVE-2026-78148
AI - closed7.3llama.cpp CVE-2026-78147: llama.cpp RPC server vulnerable to insecure deserialization
Patch now · Disclosed · since 23 Aug 2026 · CVE-2026-78147
AI - closed8.5llama.cpp CVE-2026-43622: llama.cpp double free vulnerability in LLaMA-Android
Patch now · Disclosed · since 6 Aug 2026 · CVE-2026-43622
AI - closed6.8llama.cpp Null Pointer Dereference in LLaMA-Android JNI Wrapper
Patch now · Disclosed · since 6 Aug 2026 · CVE-2026-70639
AI - closed8.5llama.cpp Integer Overflow in llama.cpp llama_batch_init
Patch now · Disclosed · since 6 Aug 2026 · CVE-2026-43627
AI - closed6.5llama.cpp Out-of-Bounds Read in llama.cpp Slot Save Directory
Patch now · Disclosed · since 6 Aug 2026 · CVE-2026-43630
AI