CVE-2026-30830
Defuddle: XSS via unescaped string interpolation in _findContentBySchemaText image tag
LOW 2.1EPSS 0.3%
Defuddle cleans up HTML pages. Prior to version 0.9.0, the _findContentBySchemaText method in src/defuddle.ts interpolates image src and alt attributes directly into an HTML string without escaping. An attacker can use a " in the alt attribute to break out of the attribute context and inject event handler. This issue has been patched in version 0.9.0.
- Affected
- kepano · defuddle
- CVSS v4.0 GITHUB
- 2.1 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v4.0 GitHub
- 2.1 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P - CVSS v3.1 NVD
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS
- 0.28% chance of exploitation in the next 30 days, 19th percentile
- Published
- 2026-03-07
- Updated
- 2026-03-10
Proof-of-concept exploits (1)
Security advisories
- kepano/defuddle/security/advisories/GHSA-5mq8-78gm-pjmq
- kepano/defuddle/commit/f154cb740ee603431b69638273af737a27156df9