Medium 6.1Published Sep 28, 2026

CVE-2026-102333httpdbg before 2.2.1 Stored Cross-Site Scripting via javascript URL

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects cle-b httpdbg. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for cle-b httpdbg

Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cle-b httpdbg cle_b:httpdbg (from the name)	before 2.2.1	CNA record

References

https://github.com/cle-b/httpdbg/issues/220issue-tracking
https://github.com/cle-b/httpdbg/pull/222patch, issue-tracking
https://github.com/cle-b/httpdbg/commit/121845b41c19ddaf30b51be0797bc2ff4847d8b3patch
https://github.com/cle-b/httpdbg/releases/tag/v2.2.1release-notes
https://github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/webapp/static/index.htm#L302technical-description
https://github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/hooks/recordhttp2.py#L88-L97technical-description
https://github.com/cle-b/httpdbgproduct
https://www.vulncheck.com/advisories/httpdbg-before-2.2.1-stored-cross-site-scripting-via-javascript-urlthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.