RUSTSEC-2022-0003: Space bug in `clean_text`

What to do

1. See which version you have: cargo tree -i ammonia (it also shows which of your dependencies pulls it in).
2. Update within your version requirement: cargo update -p ammonia. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for example ammonia = "3.1.3") or update the dependency that pulls it in.
3. Check again with cargo audit, or paste your Cargo.lock into our Cargo.toml checker.

Details from the advisory

An incorrect mapping from HTML specification to ASCII codes was used. Because HTML treats the Form Feed as whitespace, code like this has an injection bug:

let html = format!("<div title={}>", clean_text(user_supplied_string));

Applications are not affected if they quote their attributes, or if they don't use clean_text at all.

References

• Package: crates.io/crates/ammonia
• Advisory: rustsec.org/advisories/RUSTSEC-2022-0003.html
• Web: github.com/rust-ammonia/ammonia/pull/147

From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.

Other advisories for ammonia

• Vulnerability HighRUSTSEC-2019-0001 · 2019-04-27Uncontrolled recursion leads to abort in HTML serialization
• VulnerabilityRUSTSEC-2021-0074 · 2021-07-08Incorrect handling of embedded SVG and MathML leads to mutation XSS
• VulnerabilityRUSTSEC-2021-0157 · 2021-10-10Incorrect escaping for `url("")` functions in CSS style attributes
• VulnerabilityRUSTSEC-2021-0158 · 2021-10-10XSS in ammonia via SVG `animateMotion`, `animateTransform`, and/or `animateColor` tags
• VulnerabilityRUSTSEC-2025-0071 · 2025-09-21Incorrect handling of embedded SVG and MathML leads to mutation XSS after removal
• VulnerabilityRUSTSEC-2026-0193 · 2026-06-30mXSS in ammonia via MathML `annotation-xml` encoding strip
• VulnerabilityRUSTSEC-2026-0213 · 2026-07-21XSS in ammonia via SVG `animate` and `set` animation tags
• VulnerabilityRUSTSEC-2026-0373 · 2026-10-16Missing case-insensitive matching for CSS url function

Full security history of ammonia