EUVD-2026-39975

nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting...

EUVD-2026-37798

PHP Standard Library: HTTP/2 server-side missing content-length validation enables request smuggling...

Linux Distros Unpatched Vulnerability : CVE-2026-54388

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Tinyproxy through 1.11.3, fixed in commit 364cdb6, fails to reject requests containing multiple Content- Length headers with differing values, forwarding all...

Astra Linux – Vulnerability in libproxy

In libproxy, the url.cpp module in version 0.4.15 is vulnerable to a buffer overflow when PAC is enabled. This vulnerability was confirmed by using a large PAC file that was sent without a Content-length header...

Astra Linux – Vulnerability in Netty

The HttpObjectDecoder.java file in Netty before version 4.1.44 allowed a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header...

Astra Linux – Vulnerability in Waitress

Waitress version 1.3.1 allows for the smuggling of requests by sending the Content-Length header twice. Waitress would fold the two Content-Length headers together, and since it cannot convert the now comma-separated values into integers, it internally sets the Content-Length to 0. If two...

Astra Linux – Vulnerability in Twisted

In Twisted Web version 19.10.0, there was an HTTP request splitting vulnerability. When two content-length headers were provided, the system ignored the first header. When the second content-length value was set to zero, the request body was interpreted as a pipelined request...

Astra Linux – Vulnerability in HAPProxy

HAProxy versions 2.0.32, 2.1.x, and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 send empty Content-Length headers, violating section 8.6 of RFC 9110. In rare cases, an HTTP/1 server behind HAPProxy may interpret...

CVE-2026-54388

Tinyproxy (≤ 1.11.3) is affected by CVE-2026-54388. The issue occurs when a request contains multiple Content-Length headers with differing values: Tinyproxy forwards all duplicate headers to the backend but uses the first value to determine how many body bytes to consume. This desynchronizes pro...

Improper Input Validation

hono is vulnerable to Improper Input Validation. The vulnerability is due to trusting the client-supplied Content-Length header instead of validating the actual request body size, which allows an attacker to bypass configured body size limits by declaring a smaller content length while sending a...

hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length`

Summary The Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge the body is delivered fully buffered and the adapter builds the request with the client-declared...

Improper Validation of Specified Quantity in Input

Overview python-multipart is an A streaming multipart parser for Python Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input in the parseform function when processing a negative Content-Length header. An attacker can cause excessive memory usage b...

PT-2026-48924

Impact When NIOHTTPRequestDecompressor is configured with .ratioN, the decompression limit is enforced using the Content-Length header value from the incoming request rather than the actual number of compressed bytes received. Since Content-Length is attacker-controlled, a malicious client can...

CVE-2026-5766

A flaw was found in Django. This vulnerability allows a remote attacker to bypass the FILEUPLOADMAXMEMORYSIZE limit by sending specially crafted ASGI Asynchronous Server Gateway Interface requests with a missing or understated Content-Length header. This can lead to large files being loaded into...

SUSE CVE-2025-11374

Consul and Consul Enterprise's “Consul” key/value endpoint is vulnerable to denial of service DoS due to incorrect Content Length header validation. This vulnerability, CVE-2025-11374, is fixed in Consul Community Edition 1.22.0 and Consul Enterprise 1.22.0, 1.21.6, 1.20.8 and 1.18.12...

SUSE CVE-2025-11375

Consul and Consul Enterprise's “Consul” event endpoint is vulnerable to denial of service DoS due to lack of maximum value on the Content Length header. This vulnerability, CVE-2025-11375, is fixed in Consul Community Edition 1.22.0 and Consul Enterprise 1.22.0, 1.21.6, 1.20.8 and 1.18.12...

GHSA-8RWR-F68V-CVW6 NocoDB: Attachment Size Limit Bypass via Upload-by-URL

Summary The upload-by-URL path did not enforce NCATTACHMENTFIELDSIZE against either the remote file's advertised Content-Length or the decoded length of a data: URI, allowing an authenticated user to bypass the configured per-file size limit. Details The attachments service now checks...

CLSA-2026-1778836031 libsoup: Fix of CVE-2026-2708

CVE-2026-2708: reject duplicate Content-Length headers with different values to prevent HTTP request smuggling per RFC 9110 section 7.7...

[SECURITY] Fedora 42 Update: nginx-mod-headers-more-0.39-9.fc42

This module allows adding, setting, or clearing specified input/output header s. This is an enhanced version of the standard headers module because it provides more utilities like resetting or clearing "builtin headers" like Content-Type, Content-Length, and Server...

[SECURITY] Fedora 44 Update: nginx-mod-headers-more-0.39-9.fc44

This module allows adding, setting, or clearing specified input/output header s. This is an enhanced version of the standard headers module because it provides more utilities like resetting or clearing "builtin headers" like Content-Type, Content-Length, and Server...