CVE-2026-24874Network attack vector

Memory read and write via unchecked Lua value

Published Jan 27, 2026 · Updated Jan 27, 2026

Type confusion in X-Ray Monolith before 2025.12.30 allows remote attackers to read or write arbitrary memory through Lua debug requests. In the bundled LuaJIT lj_debug_getinfo function, a debug-only api_check lets a non-function stack value reach funcV in release builds; the patch adds an unconditional tvisfunc rejection. Exploitation requires control of the value inspected with the greater-than option, while the published record does not identify the network path that supplies it.

CVSS severity9.1
Critical
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in X-Ray Monolith before 2025.12.30 allows remote attackers to read or write arbitrary memory through Lua debug requests. In the bundled LuaJIT lj_debug_getinfo function, a debug-only api_check lets a non-function stack value reach funcV in release builds; the patch adds an unconditional tvisfunc rejection. Exploitation requires control of the value inspected with the greater-than option, while the published record does not identify the network path that supplies it.

The record

CVE
CVE-2026-24874
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
themrdemonized
Product
X-Ray Monolith
Classifications
CWE-843
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2025.12.30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

themrdemonized · X-Ray Monolithversion=0 <2025.12.30

Published CVSS scores

9.1Government Technology Agency of Singapore Cyber Security GroupCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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