CVE-2026-47345 json
TYPO3 HTML Sanitizer allows Cross-Site Scripting
published 2026-06-08 5 mo ago modified 2026-09-10 1 mo ago also GHSA-p5j5-4j3q-8mq8 , EUVD-2026-35192
- cvss
- 5.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
Namespace attributes are not encoded correctly during HTML serialization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.
Patch / fix
- packagist typo3/html-sanitizer 2.3.2
- TYPO3 HTML Sanitizer 2.3.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N |
| CNA | 4.0 | 5.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/html-sanitizer | <2.3.2 |
2.3.2 |
Affected products
- TYPO3 HTML Sanitizer
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764
patch, web
-
typo3.org
/security/advisory/typo3-core-sa-2026-006
vendor-advisory, web
-
github.com
/TYPO3/html-sanitizer/security/advisories/GHSA-p5j5-4j3q-8mq8
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-47345
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/html-sanitizer/CVE-2026-47345.yaml
web
-
github.com
/TYPO3/html-sanitizer
package
Sources
- CVE List CVE-2026-47345
- GitHub Advisory GHSA-p5j5-4j3q-8mq8
- NVD CVE-2026-47345
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