libxmljs attrs type confusion RCE

published 2024-05-02 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-1447 , GHSA-6433-x5p4-8jc7

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

libxmljs is vulnerable to a type confusion vulnerability when parsing a specially crafted XML while invoking a function on the result of attrs() that was called on a parsed node. This vulnerability might lead to denial of service (on both 32-bit systems and 64-bit systems), data leak, infinite loop and remote code execution (on 32-bit systems with the XML_PARSE_HUGE flag enabled).

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-05-03)

Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

research.jfrog.com https://research.jfrog.com/vulnerabilities/libxmljs-attrs-type-confusion-rce-jfsa-2024-001033988/ referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/libxmljs/libxmljs/issues/645 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	libxmljs	<=1.0.11	no fix listed

Affected products

libxmljs_project libxmljs

Classification

Weakness

CWE-843 Access of Resource Using Incompatible Type

References

research.jfrog.com /vulnerabilities/libxmljs-attrs-type-confusion-rce-jfsa-2024-001033988/
exploit, third-party-advisory
github.com /libxmljs/libxmljs/issues/645
web, exploit, issue-tracking
nvd.nist.gov /vuln/detail/CVE-2024-34391
advisory
github.com /libxmljs/libxmljs
package
research.jfrog.com /vulnerabilities/libxmljs-attrs-type-confusion-rce-jfsa-2024-001033988
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary