Denial of Service (DoS)

published 2022-05-01 4 y ago modified 2026-07-08 4 mo ago also GHSA-773h-w45w-f2f9 , EUVD-2022-2933

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

This affects all versions of package libxmljs. When invoking the libxmljs.parseXml function with a non-buffer argument the V8 code will attempt invoking the .toString method of the argument. If the argument's toString value is not a Function object V8 will crash.

Patch / fix

fixed in 2 links 2

npm libxmljs 0.19.8
libxmljs_project libxmljs 0.19.8

github.com/libxmljs/libxmljs@2501807 commit
github.com/libxmljs/libxmljs#594 pull request

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-21144 updated 2025-11-21 cvss 7.5

libxmljs: libxmljs V8 parseXml buffer overflow

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.92% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/vuln/SNYK-JS-LIBXMLJS-2348756 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	libxmljs	<0.19.8	0.19.8

Affected products

n/a libxmljs

Classification

Weakness

CWE-20 Improper Input Validation

References

github.com /libxmljs/libxmljs/pull/594
web, patch, third-party-advisory
github.com /libxmljs/libxmljs/commit/2501807bde9b38cfaed06d1e140487516d91379d
web, patch, third-party-advisory
snyk.io /vuln/SNYK-JS-LIBXMLJS-2348756
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-21144
advisory
github.com /libxmljs/libxmljs
package

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.

Summary