CVE-2026-116840: ggml-org llama.cpp

llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader

CVSS 6.9 MediumEPSS 0.0013 · 2nd percentile

Published by the CVE Program (CNA: VulnCheck) at 27 Oct 2026, 00:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
ggml-org	llama.cpp pkg:github/ggml-org/llama.cpp	affected b5854 to before b11275 custom affected 0.1.0 to before 0.6.0 semver Other versions: unaffected

Identifiers

CVE-2026-116840

CNA

VulnCheck

Weakness (CWE)

CWE-190

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
6.1	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 27 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/ggml-org/llama.cpp/issues/26978 issue-tracking
github.com/ggml-org/llama.cpp/pull/26979 patchissue-tracking
github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44 patch
github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795 technical-description
github.com/ggml-org/llama.cpp/releases/tag/b11275 release-notes
www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-overflow-in-gguf-init-from-reader third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.