lazy_html serializes SVG and MathML style and script text unescaped, allowing mutation XSS
## Summary Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in dashbitco lazy_html allows mutation XSS via a parse and serialize round-trip of attacker-supplied HTML. `LazyHTML.to_html/2` and `LazyHTML.Tree.to_html/2` decide whether to escape an element's text from its tag name alone. A `style` or `script` element inside SVG or MathML foreign content is parsed with character references decoded, but is serialized as an HTML raw-text element, so its text is emitted unescaped. Encoded markup such as `</style><img src=x onerror=...>` inside `
EEF-CVE-2026-92106
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:EEF-CVE-2026-92106
lazy_html
Source reference: /affected/0/package/name
- Affected versions
- 0.1.0
Source reference:
/affected/0/versions0.1.1Source reference:
/affected/0/versions0.1.10Source reference:
/affected/0/versions0.1.11Source reference:
/affected/0/versions0.1.12Source reference:
/affected/0/versions0.1.2Source reference:
/affected/0/versions0.1.3Source reference:
/affected/0/versions0.1.4Source reference:
/affected/0/versions0.1.5Source reference:
/affected/0/versions0.1.6Source reference:
/affected/0/versions0.1.7Source reference:
/affected/0/versions0.1.8Source reference:
/affected/0/versions0.1.9Source reference:
/affected/0/versions - Fixed versions
- 0.1.13
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0.1.0"
},
{
"fixed": "0.1.13"
}
]
}
],
"package": {
"name": "lazy_html",
"purl": "pkg:hex/lazy_html",
"ecosystem": "Hex"
},
"versions": [
"0.1.0",
"0.1.1",
"0.1.10",
"0.1.11",
"0.1.12",
"0.1.2",
"0.1.3",
"0.1.4",
"0.1.5",
"0.1.6",
"0.1.7",
"0.1.8",
"0.1.9"
],
"database_specific": {
"source": "https://cna.erlef.org/osv/EEF-CVE-2026-92106.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/dashbitco/lazy_html",
"type": "GIT",
"events": [
{
"introduced": "1dee15746c024916b3110af8b168c2f3b3065fbd"
},
{
"fixed": "f32c7fd6223225b68bc8691c78b6d4a77972f1d5"
}
]
}
],
"versions": [
"v0.1.12",
"v0.1.11",
"v0.1.10",
"v0.1.9",
"v0.1.8",
"v0.1.7",
"v0.1.6",
"v0.1.5",
"v0.1.4",
"v0.1.3",
"v0.1.2",
"v0.1.1",
"v0.1.0"
],
"database_specific": {
"source": "https://cna.erlef.org/osv/EEF-CVE-2026-92106.json",
"vanir_signatures": [
{
"id": "EEF-CVE-2026-92106-3b362797",
"digest": {
"threshold": 0.9,
"line_hashes": [
"90580969371312759060218553849842762155",
"280370715495015491356308257904647850745",
"313156110902979146990051129963006853764",
"76688445630280347675906510080577143580"
]
},
"source": "https://github.com/dashbitco/lazy_html/commit/f32c7fd6223225b68bc8691c78b6d4a77972f1d5",
"target": {
"file": "c_src/lazy_html.cpp"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "EEF-CVE-2026-92106-48a8e963",
"digest": {
"length": 301,
"function_hash": "310579417436848425715483271822210258623"
},
"source": "https://github.com/dashbitco/lazy_html/commit/f32c7fd6223225b68bc8691c78b6d4a77972f1d5",
"target": {
"file": "c_src/lazy_html.cpp",
"function": "is_noescape_text_node"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-09-25T14:00:17Z"
}
}
]- Related CVEs
- CVE-2026-92106
Source reference:
/aliases
Publisher severity
No explicit severity was provided.
- Event
- #15204 · Revision 1
- Added to Heist Feed
- Publisher date