Medium · CVSS 6.9CVE-2026-55614

uhttpd vulnerable to HTTP request smuggling via case-sensitive Transfer-Encoding matchingCVE-2026-55614

Answer in brief

CVE-2026-55614 records a Medium severity (CVSS 6.9) vulnerability in uhttpd vulnerable to HTTP request smuggling via case-sensitive Transfer-Encoding matching. The current sources do not mark it as known exploited. The current feed maps openwrt/uhttpd (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 30, 2026Updated Oct 30, 2026Source checked Oct 30, 2026First seen by HOL Oct 30, 2026Material review Oct 30, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openwrt/uhttpd (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openwrt/uhttpdgeneric	>=2bef561c890f275ce3b785e6abdb3eda28c96aa8 <ae015e099986ceace44975cb69629841a2d58d37 \|\| >=2bef561c890f275ce3b785e6abdb3eda28c96aa8 <6641b050e5f7c7fd9ae92e8e119d6d6dfc6e9837	ae015e099986ceace44975cb69629841a2d58d37, 6641b050e5f7c7fd9ae92e8e119d6d6dfc6e9837

Recommended response

Check inventory. Check lockfiles and deployed manifests for openwrt/uhttpd.
Review the reported fix. Update openwrt/uhttpd to ae015e099986ceace44975cb69629841a2d58d37 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 30, 2026

Sources and claim methodology

Upstream source description

uhttpd is a small HTTP server. In unpatched repository snapshots, `client_parse_header()` in `client.c` lowercases header names but compares the `Transfer-Encoding` value to `chunked` using case-sensitive `strcmp`. A mixed-case transfer-coding token is accepted without enabling `r->transfer_chunked`, despite transfer-coding tokens being case-insensitive. On a keep-alive connection, the `chunked` POST body is left unread and request-shaped body bytes are parsed as another HTTP request, permitting HTTP request smuggling and boundary desynchronization. Commits ae015e099986ceace44975cb69629841a2d58d37 and 6641b050e5f7c7fd9ae92e8e119d6d6dfc6e9837 patch the issue.

Quoted source text, attributed separately from HOL analysis.