CVE-2026-107183

HIGH 8.1

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

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-416
Vendor	ggml-org
Product	llama.cpp
Published	Oct 7, 2026
Last Updated	Oct 7, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

ggml-org / llama.cpp

b8227 < b11393

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ggml-org/llama.cpp/pull/29942 github.com: https://github.com/ggml-org/llama.cpp/commit/dbe4c3ed42343f0a7ba0fd7e808ffeaca404d29f github.com: https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/common/chat-peg-parser.cpp#L343-L355 github.com: https://github.com/ggml-org/llama.cpp/blob/bed0a856606ee4a24a164066f73d2379447033f5/tools/server/server-schema.cpp#L321-L324 github.com: https://github.com/ggml-org/llama.cpp vulncheck.com: https://www.vulncheck.com/advisories/llama-cpp-before-b11393-use-after-free-via-common-chat-peg-mapper-chat-parser

Credits

Anas