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TI-2026-76381 Aliases CVE-2026-112108GHSA-m697-qhc6-c837

Buffer overflow in ztxz16 fastllm GGUF string parsing

Priority MEDIUM 57CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

ztxz16 fastllm up to 0.1.8.2 is affected. Manipulating the len argument of the GGUFBuffer::ReadString function in the GGUF parser causes a buffer overflow (CWE-120). A remote attacker without privileges can trigger it, and a public exploit has been disclosed.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A vulnerability was determined in ztxz16 fastllm up to 0.1.8.2. This impacts the function GGUFBuffer::ReadString of the file third_party/gguf/gguf.cpp of the component String Parsing. This manipulation of the argument len causes buffer overflow. The attack can be initiated remotely. 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00267 18th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ztxz16fastllm0.1.8.0; 0.1.8.1; 0.1.8.2—No fix listedCNA
  • fastllm Vendorztxz16 Affected 0.1.8.0; 0.1.8.1; 0.1.8.2 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ztxz16:fastllm:*:*:*:*:*:*:*:*——ztxz16
  • cpe:2.3:a:ztxz16:fastllm:*:*:*:*:*:*:*:* Versions — — ·ztxz16

Remediation

The sources list no fixed version for fastllm.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-112108
  2. 2026-10-19 Alias added: GHSA-m697-qhc6-c837
  3. 2026-10-22 CISA SSVC decision points changed
  4. 2026-10-22 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 2

  • TI-2026-76373 Buffer overflow in ztxz16 fastllm Safetensors weight loading CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences