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CVE-2026-107183

Status: Awaiting AnalysisCritical (9.2)—

llama.cpp before b11393 contains a use-after-free and double free vulnerability in common_chat_peg_mapper::map that allows unauthenticated remote attackers to corrupt heap memory via a dangling current_tool pointer. Attackers can submit a chat_parser in a POST /completion request emitting a tool-id after a tool-close tag to crash llama-server and shape a heap write primitive.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

CWE-416 (use-after-free) en endpoint POST /completion accesible remotamente sin autenticación (AV:N, PR:N). La corrupción de heap permite ejecución de código o DoS. Confianza moderada: el texto describe corrupción pero no ejecutabilidad explícita.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Llama CPP — Llama CPPAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-107183",
  "cveTags": [],
  "metrics": {
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          "options": [
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          "version": "2.0.3",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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  "published": "2026-10-07T14:17:09.003",
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      "url": "https://github.com/ggml-org/llama.cpp",
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    {
      "url": "https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/common/chat-peg-parser.cpp#L343-L355",
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      "lang": "en",
      "value": "llama.cpp before b11393 contains a use-after-free and double free vulnerability in common_chat_peg_mapper::map that allows unauthenticated remote attackers to corrupt heap memory via a dangling current_tool pointer. Attackers can submit a chat_parser in a POST /completion request emitting a tool-id after a tool-close tag to crash llama-server and shape a heap write primitive."
    }
  ],
  "lastModified": "2026-10-07T15:57:20.793",
  "sourceIdentifier": "disclosure@vulncheck.com"
}