CVE-2026-107183

llama.cpp before b11393 Use-After-Free via common_chat_peg_mapper chat_parser

HIGH
8.1
CVSS Score
Published: October 7, 2026 at 01:35 PM UTC
Updated: October 7, 2026 at 03:57 PM UTC
2 products affected across 2 vendorsLlama.cppLlama.cpp

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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

b8227 ≤ v < b11393
b8227 ≤ v < b11393b8227

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-416

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