# CVE-2026-102333 — cle-b httpdbg

> As of 2026-09-29, CVE-2026-102333 is a MEDIUM-severity vulnerability in cle-b httpdbg, CVSS v3.1 6.1, EPSS 0.2% (10.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-102333 as of 2026-09-29; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-29

## What is 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.

The record classifies CVE-2026-102333 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 7 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.1 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 10.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-28, last modified 2026-09-29

## Is CVE-2026-102333 being exploited?

It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **cle-b**: httpdbg

## How to fix CVE-2026-102333

No vendor patch reference has been recorded for CVE-2026-102333 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-102333

No threat campaign in the Threadlinqs corpus currently references CVE-2026-102333, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-29. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — patch](https://github.com/cle-b/httpdbg/pull/222)
- [github.com — patch (121845b41c19ddaf30b51be0797bc2ff4847d8b3)](https://github.com/cle-b/httpdbg/commit/121845b41c19ddaf30b51be0797bc2ff4847d8b3)
- [github.com — release notes](https://github.com/cle-b/httpdbg/releases/tag/v2.2.1)

**Technical analysis**

- [github.com — technical description](https://github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/webapp/static/index.htm#L302)
- [github.com — technical description (recordhttp2)](https://github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/hooks/recordhttp2.py#L88-L97)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/httpdbg-before-2.2.1-stored-cross-site-scripting-via-javascript-url)

**Issue tracking and product pages**

- [github.com — issue tracking](https://github.com/cle-b/httpdbg/issues/220)
- [github.com — product](https://github.com/cle-b/httpdbg)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-102333
Full detection coverage and IOCs for threats exploiting CVE-2026-102333 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp