CVE-2023-49146 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in rhukster/dom-sanitizer. A fix is available for rhukster/dom-sanitizer — see the affected versions and patch details below.
Cross-site Scripting in DOMSanitizer
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
rhukster/dom-sanitizerReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
DOMSanitizer (aka dom-sanitizer) before 1.0.7 allows XSS via an SVG document because of mishandling of comments and greedy regular expressions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | rhukster/dom-sanitizer | all versions | 1.0.7composer require rhukster/dom-sanitizer:^1.0.7 |
Affected Products
dom-sanitizergetgravDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rhukster/dom-sanitizer, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update rhukster/dom-sanitizer to 1.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-49146 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2023-49146 in your dependencies?
Find it across Packagist, including transitive dependencies.