Vulnerability HighRUSTSEC-2019-0001 · ammonia
RUSTSEC-2019-0001: Uncontrolled recursion leads to abort in HTML serialization
Short answerA security vulnerability in the ammonia crate: Uncontrolled recursion leads to abort in HTML serialization. High severity (CVSS 7.5). Fixed in 2.1.0: update to a fixed version.
| Crate | ammonia |
|---|---|
| Type | Vulnerability |
| Affected versions | Before 2.1.0. |
| Fixed in | 2.1.0 |
| Severity | High, CVSS 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2019-04-27 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2019-15542, GHSA-5hp8-35wj-m525 |
| Affected functions | ammonia::Document::to_string, ammonia::Document::write_to, ammonia::clean |
What to do
- See which version you have:
cargo tree -i ammonia(it also shows which of your dependencies pulls it in). - 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 exampleammonia = "2.1.0") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Affected versions of this crate did use recursion for serialization of HTML DOM trees.
This allows an attacker to cause abort due to stack overflow by providing a pathologically nested input.
The flaw was corrected by serializing the DOM tree iteratively instead.
References
- Package: crates.io/crates/ammonia
- Advisory: rustsec.org/advisories/RUSTSEC-2019-0001.html
- Web: github.com/rust-ammonia/ammonia/blob/master/CHANGELOG.md#210
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
- 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-2022-0003 · 2022-01-19Space bug in `clean_text`
- 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
Up next
Same crateammonia: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?