CVE-2026-54570
- Source
- https://cve.org/CVERecord?id=CVE-2026-54570
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54570.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-54570
- Aliases
- Downstream
- Published
- 2026-08-18T17:39:51Z
- Modified
- 2026-10-28T02:31:06Z
- Severity
-
- 6.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N CVSS Calculator
- Summary
- AngleSharp: HTML5 Spec Compliance: mXSS via annotation-xml HTML Integration Point Bypass
- Details
-
AngleSharp is a .NET library for parsing angle bracket based hyper-texts. Prior to 1.5.0, MathAnnotationXmlElement in AngleSharp/Mathml/Dom/Internal/MathAnnotationXmlElement.cs is not treated as an HTML integration point when its encoding attribute is text/html or application/xhtml+xml, causing Consume in AngleSharp/Html/Parser/HtmlDomBuilder.cs to route tokens through foreign-content parsing instead of HTML parsing. A sanitizer can therefore observe a different DOM from the browser that reparses the serialized output. An attacker can combine this namespace differential with markup-breaking characters in an attribute value so that an element hidden from the sanitizer becomes active script-capable HTML after browser reparse, resulting in mutation cross-site scripting. This issue is fixed in version 1.5.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-80" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54570.json" }- References
-
- https://github.com/AngleSharp/AngleSharp/releases/tag/1.5.0
- https://github.com/AngleSharp/AngleSharp/security/advisories/GHSA-pgww-w46g-26qg
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54570.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-54570
- https://github.com/AngleSharp/AngleSharp/commit/8033a5c690af9c2c443f58e34875343fa4cc1d07
Affected packages
Git / github.com/anglesharp/anglesharp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/anglesharp/anglesharp
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "1.5.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "8033a5c690af9c2c443f58e34875343fa4cc1d07" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "1.5.0", "range": [ { "fixed": "868a3d2f10e191c72e7adc32972e185cce652356" } ], "source": "REFERENCES_TAG" } ] }