CVE-2026-116816: ggml-org llama.cpp

llama.cpp b5899 before b10261 Heap Out-of-Bounds Write via plamo2 Tokenizer

CVSS 8.5 HighEPSS 0.0014 · 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 b5899 to before b10261 custom Other versions: unaffected

Identifiers

CVE-2026-116816

CNA

VulnCheck

Weakness (CWE)

CWE-129

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
8.5	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0014, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

27 Oct 2026, 00:33 UTC Confirmed by the CVE List

Sources

References from the CNA

github.com/ggml-org/llama.cpp/pull/25969 issue-trackingpatch
github.com/ggml-org/llama.cpp/pull/26511 patchissue-tracking
github.com/ggml-org/llama.cpp/commit/cf06ad7dfe79e7bf2934150d4fefe1ce8db05490 patch
github.com/ggml-org/llama.cpp/blob/b10259/src/llama-vocab.cpp#L1376-L1377 technical-description
github.com/ggml-org/llama.cpp/releases/tag/b10261 release-notes
www.vulncheck.com/advisories/llama-cpp-b5899-before-b10261-heap-out-of-bounds-write-via-plamo2-tokenizer 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.