Out-of-bounds Read Vulnerability in Turboderp-org ExLlamaV3 Software
CVE-2026-124994

5.3MEDIUM

Key Information:

Vendor

Turboderp-org

Status
Exllamav3
Vendor
CVE Published:
9 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-124994?

A security flaw has been identified in Turboderp-org's ExLlamaV3 software, specifically affecting versions up to 1.6.3. The vulnerability resides in the ngram_dequant function located in the ngram.cu file within the NGramEmbedding component. When the head_bias argument is manipulated, it can lead to an out-of-bounds read, which may be targeted remotely by attackers. This issue poses a risk as the exploit has been made public, allowing for potential remote attacks. Users are strongly advised to upgrade to version 1.6.4, which includes a patch (commit c9a57ae832a3035e264e0a412e1daf4ebb699b98) to rectify this vulnerability.

Affected Version(s)

ExLlamaV3 1.6.0

ExLlamaV3 1.6.1

ExLlamaV3 1.6.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-124994 - Proof of Concept

References

https://vuldb.com/vuln/433165
vdb-entrytechnical-description
https://vuldb.com/vuln/433165/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-124994
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dem00000 (VulDB User)
.