CVE-2022-23514 - CVE House
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Status published High CVE-2022-23514

Inefficient Regular Expression Complexity in Loofah

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2022-23516
Uncontrolled Recursion in Loofah
High 7.5
CVE-2022-23515
Improper neutralization of data URIs may allow XSS in Loofah
Medium 6.1

Affected Vendor

flavorjones

View all reports →

Affected Software

loofah
Vulnerable Versions:
< 2.19.1

Timeline

Official Publish: December 14th, 2022
Last Modified: November 3rd, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-1333

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access
T1496 Resource Hijacking
Impact
T1562 Impair Defenses
Defense Evasion
T1070 Indicator Removal on Host
Defense Evasion