CVE-2026-102342

MEDIUM 5.4

ammonia allows stored XSS through unsanitized SVG animate and set attributes

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.3, 4.0.3, and 4.1.4, applications that allow the SVG animate or set elements can retain an animation whose attributeName targets href and whose value uses the javascript scheme. The sanitized SVG can therefore create a script-bearing link, and a user who clicks the link can execute attacker-controlled script in the application's origin, enabling stored cross-site scripting. This issue is fixed in versions 3.3.3, 4.0.3, and 4.1.4.

CWE	CWE-79
Vendor	rust-ammonia
Product	ammonia
Published	Oct 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

rust-ammonia / ammonia

< 3.3.3 >= 4.0.0, < 4.0.3 >= 4.1.2, < 4.1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗