What’s Vulnerable › Vulnerabilities
CVE-2026-102342: ammonia allows stored XSS through unsanitized SVG animate and set attributes
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-13 · updated 2026-10-16
- Weakness: CWE-79
Description
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.
Affected products
- Crates.Io Ammonia: from 0.0.0-0 before 3.3.3; from 4.0.0 before 4.0.3; from 4.1.0 before 4.1.4 — fixed in 3.3.3, 4.0.3, 4.1.4
- rust-ammonia ammonia: before 3.3.3; from 4.0.0, < 4.0.3; from 4.1.2, < 4.1.4
How to fix
Upgrade to a fixed version: Crates.Io Ammonia 3.3.3, 4.0.3, 4.1.4. Check the vendor advisory for mitigations.
References
- https://github.com/rust-ammonia/ammonia/commit/9394bd81179e756cb911314deabd943f1a9c8989
- https://github.com/rust-ammonia/ammonia/commit/9e3335e2dd8ab07346ff7997f20662a3da4023f6
- https://github.com/rust-ammonia/ammonia/commit/d2ae1547f478bd84d158bc5e57f5d31437dc4d8d
- https://github.com/rust-ammonia/ammonia/pull/250
- https://github.com/rust-ammonia/ammonia/pull/251
- https://github.com/rust-ammonia/ammonia/pull/252
- https://github.com/rust-ammonia/ammonia/releases/tag/v3.3.3
- https://github.com/rust-ammonia/ammonia/releases/tag/v4.0.3
- https://github.com/rust-ammonia/ammonia/releases/tag/v4.1.4
- https://github.com/rust-ammonia/ammonia/security/advisories/GHSA-m6mh-2hw2-555x
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