CVE-2022-23517

HIGH7.5

Inefficient Regular Expression Complexity in rails-html-sanitizer

Published Dec 14, 2022

Modified 2 months ago

No fix available

Details

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use 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 has been patched in version 1.4.4.

References

WEBhttps://github.com/rails/rails-html-sanitizer/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979 WEBhttps://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8w WEBhttps://hackerone.com/reports/1684163 WEBhttps://lists.debian.org/debian-lts-announce/2023/09/msg00012.html WEBhttps://lists.debian.org/debian-lts-announce/2024/09/msg00045.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2022-23517

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Weakness Type (CWE)

Resource Management

CWE-1333

ReDoS (Regex DoS)

Ecosystems

Timeline

PublishedDec 14, 2022

ModifiedNov 3, 2025