Home/CVE/Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri
CVE

CVE-2022-23514

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption.

This issue is patched in version 2.19.1.

HIGH · CVSS 7.5 EPSS 0.00271
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1333Inefficient Regular Expression Complexity
▤

Affected Products & Versions

1
loofah project loofah< 2.19.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
RubyGems loofah HIGH fixed in 2.19.1
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Dec 2022 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2026:10353-1
suse-csafopenSUSE-SU-2025:15120-1
suse-csafopenSUSE-SU-2024:14171-1
suse-csafopenSUSE-SU-2024:12768-1
suse-csafSUSE-SU-2023:1657-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/flavorjones/loofah/security/advisories/GHSA-486f-hjj9-9vhhThird Party Advisory
https://hackerone.com/reports/1684163Permissions RequiredThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00011.html
https://lists.debian.org/debian-lts-announce/2024/09/msg00044.html
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