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CVE-2026-55614medium6.9

uhttpd vulnerable to HTTP request smuggling via case-sensitive Transfer-Encoding matching

Impact

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…

Source excerpt · GitHub_M

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

openwrt · GitHub_M

uhttpd

2 ranges
GitHub_M version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

>= 2bef561c890f275ce3b785e6abdb3eda28c96aa8, < ae015e099986ceace44975cb69629841a2d58d37

>= 2bef561c890f275ce3b785e6abdb3eda28c96aa8, < 6641b050e5f7c7fd9ae92e8e119d6d6dfc6e9837

unaffected

unknown

Other versions: unknown

Original 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-55614

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-444 ↗

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

GitHub_M

Related →
Contributing organizations · 1
GitHub_M

Assigning organization

2026-10-30

What changed

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No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

3 sources
github.com/openwrt/uhttpd/security/advisories/GHSA-mcfg-c4r7-pjpf
Security advisoryGitHub_M
github.com/openwrt/uhttpd/commit/6641b050e5f7c7fd9ae92e8e119d6d6dfc6e9837
PatchGitHub_M
github.com/openwrt/uhttpd/commit/ae015e099986ceace44975cb69629841a2d58d37
PatchGitHub_M