GHSA-45c6-75p6-83cc
Suggest an improvement- Source
- https://github.com/advisories/GHSA-45c6-75p6-83cc
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-45c6-75p6-83cc/GHSA-45c6-75p6-83cc.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-45c6-75p6-83cc
- Aliases
-
- CVE-2026-44664
- Downstream
- Related
- Published
- 2026-05-08T16:27:28Z
- Modified
- 2026-05-09T12:44:16.878217944Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- fast-xml-builder Comment Value regex can be bypassed
- Details
-
Summary
The fix for https://github.com/advisories/GHSA-gh4j-gqv2-49f6 in fast-xml-parser sanitizes
--sequences in XML comment content using .replace(/--/g, '- -'). This skip the values containing three consecutive dashes (e.g., --->...), allowing an attacker to break out of an XML comment and inject arbitrary XML/HTML content.Impact
Any application with comment property enabled allow attacker to inject malicious or unwanted code like JS script tag in the XML/HTML output.
Workarounds
Check for the presence of 3 consecutive dashes externally in the property value used for comment tag.
- Database specific
{ "github_reviewed": true, "github_reviewed_at": "2026-05-08T16:27:28Z", "cwe_ids": [ "CWE-91" ], "severity": "MODERATE", "nvd_published_at": null }- References
Affected packages
npm / fast-xml-builder
Package
- Name
- fast-xml-builder
- View open source insights on deps.dev
- Purl
- pkg:npm/fast-xml-builder