VulnerabilityPublished 9 Nov 2026

CVE-2026-124996: Turboderp-org ExLlamaV3 · Out-of-bounds Read

Affects Turboderp-org ExLlamaV3Source CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium.

Data as of 9 Nov 2026, 22:04 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (VulDB)	CVSS 4.0	5.3
CNA (VulDB)	CVSS 3.1	6.3
CNA (VulDB)	CVSS 3.0	6.3
CNA (VulDB)	CVSS 2.0	7.5

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:X

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: Passive
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Turboderp-orgExLlamaV3	Affected 1.6.0 – 1.6.3 4 affected builds	Fixed in–

CPE configurations (1)

cpe:2.3:a:turboderp-org:exllamav3:*:*:*:*:*:*:*:*

AI-suggested

Upgrade Turboderp-org ExLlamaV3 to version 1.6.4 or later, where this vulnerability is fixed. No other mitigations are indicated or required.

Description

CVE-2026-124996 is an out-of-bounds read vulnerability in Turboderp-org ExLlamaV3 versions 1.6.0 through 1.6.3. The flaw exists in the function routing_sel_norm_kernel within the hash-MoE routing component, caused by improper handling of the argument gate.tid2eid. Remote exploitation is possible. Upgrading to version 1.6.4 resolves the issue.

Impact

An attacker can remotely trigger an out-of-bounds read, which may lead to information disclosure or application instability. The CVSS 4.0 base score is 5.3, indicating a medium severity impact with network attack vector, low complexity, no privileges required, and user interaction needed. The vulnerability affects confidentiality, integrity, and availability to a limited extent.

Summary

This vulnerability involves an out-of-bounds read in the routing_sel_norm_kernel function of the exllamav3_ext/routing.cu file in Turboderp-org ExLlamaV3 up to version 1.6.3. The issue arises from manipulation of the gate.tid2eid argument, which leads to reading memory outside the intended bounds. The vulnerability can be exploited remotely. The vendor has fixed the issue in version 1.6.4, identified by patch c9a57ae832a3035e264e0a412e1daf4ebb699b98.

References

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