XSS in Cle-B Httpdbg
CVE-2026-102333
httpdbg before 2.2.1 fails to validate URL schemes in recorded HTTP request URLs rendered as clickable links in the web interface. Attackers controlling traffic recorded by httpdbg can supply javascript: scheme URLs that execute malicious scripts in the application origin when clicked, allowing access to captured request and response data including headers and tokens.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/cle-b/httpdbg/issues/220 (issue-tracking)
- github.com/cle-b/httpdbg/pull/222 (issue-tracking, patch)
- github.com/cle-b/httpdbg/commit/121845b41c19ddaf30b51be0797bc2ff4847d8b3 (patch)
- github.com/cle-b/httpdbg/releases/tag/v2.2.1 (release-notes)
- github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/webapp/static/index.htm (technical-description)
- github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/hooks/recordhttp2.py (technical-description)
- github.com/cle-b/httpdbg (product)
- www.vulncheck.com/advisories/httpdbg-before-2.2.1-stored-cross-site-scripting-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-102333?
- CVE-2026-102333 is a medium-severity vulnerability in Cle-B Httpdbg, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-28.
- How severe is CVE-2026-102333?
- Medium severity. CVSS v3 base score is 6.1 out of 10.