Bug 2523269

Summary: CVE-2026-18581 python-llama-cpp-python: llama.cpp: Denial of Service due to input manipulation in Jinja Minja Template Parser [fedora-all]
Product: [Fedora] Fedora Reporter: nlevinki <nlevinki>
Component: python-llama-cpp-pythonAssignee: Tomas Tomecek <ttomecek>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: jmatufka, Tom.Rix, ttomecek
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["6db4911f-d93f-4277-b5c0-307d8c9315fb"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
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Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2510191    

Description nlevinki 2026-08-25 08:21:38 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A vulnerability was determined in ggml-org llama.cpp e15efe0. Affected by this issue is some unknown functionality of the file common/jinja/parser.cpp of the component Jinja Minja Template Parser. Executing a manipulation with the input {{9|9|{ can lead to reachable assertion. The attack requires local access. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.