CVE-2026-124994
Turboderp-org ExLlamaV3 NGramEmbedding ngram.cu ngram_dequant out-of-bounds
A security flaw has been discovered in Turboderp-org ExLlamaV3 up to 1.6.3. The affected element is the function ngram_dequant of the file exllamav3/exllamav3_ext/ngram.cu of the component NGramEmbedding. The manipulation of the argument head_bias results in out-of-bounds read. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.4 is sufficient to fix this issue. The patch is identified as c9a57ae832a3035e264e0a412e1daf4ebb699b98. It is suggested to upgrade the affected component.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulDBFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulDBAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| ExLlamaV3 Turboderp-org |
1.6.0 (affected) 1.6.1 (affected) 1.6.2 (affected) 1.6.3 (affected) 1.6.4 (unaffected) |
CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 6.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | CNA: VulDB |
| 3.0 / 6.3 medium |
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | CNA: VulDB |
| 2.0 / 7.5 high |
AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C | CNA: VulDB |
Exploit evidence
- https://github.com/user-attachments/files/33598849/poc.zip
exploit · CNA: VulDB
References
- https://vuldb.com/vuln/433165CNA: VulDB · vdb-entry, technical-description
- https://vuldb.com/vuln/433165/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-124994CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1040626CNA: VulDB · third-party-advisory
- https://github.com/turboderp-org/exllamav3/issues/525CNA: VulDB · issue-tracking
- https://github.com/user-attachments/files/33598849/poc.zipCNA: VulDB · exploit
- https://github.com/turboderp-org/exllamav3/commit/c9a57ae832a3035e264e0a412e1daf4ebb699b98CNA: VulDB · patch
- https://github.com/turboderp-org/exllamav3/releases/tag/v1.6.4CNA: VulDB · patch
- https://github.com/turboderp-org/exllamav3/CNA: VulDB · product
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.