mediumVulnerability
CVE-2026-50290
## Finding **Location**: `core/src/server/render-to-string.ts:307-311` CSS value sanitization stripped `expression(` and `url(javascript:` using simple regex, but could be bypassed with CSS unicode escapes (`\65xpression(`), null bytes, or CSS comments (`exp/**/ression(`). **Mitigating Factor**: These CSS injection vectors only work in legacy browsers (IE6-IE10). SpecifyJS targets modern browsers. ## Status **Fixed in v0.2.136** — CSS sanitization now normalizes unicode escapes and strips CSS comments before pattern matching. Also checks for `behavior:`, `-moz-binding`, and `-o-link` patterns.
Properties
- ghsa_id
- GHSA-93q6-wwjh-jc6h
- severity
- medium
- summary
- @asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString
- cve_id
- CVE-2026-50290
- is_ghsa_only
- false
- ghsa_published
- 2026-07-02T19:08:45Z
- source_url
- https://github.com/advisories/GHSA-93q6-wwjh-jc6h
- ghsa_updated
- 2026-07-02T19:08:46Z
Related Entities (4)
VULNERABLE_TO (1)
←[Software]npm/@asymmetric-effort/specifyjs
AFFECTS (1)
→[Software]npm/@asymmetric-effort/specifyjs
HAS_WEAKNESS (1)
→[Weakness]Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
REPORTED_BY (1)
→[Source]GitHub Advisory Database
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