RLSA-2026:22140 Important: httpd:2.4 security update

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fixes: httpd: Apache HTTP Server: HTTP/2 DoS by Memory Increase CVE-2025-53020 httpd: modproxyajp: heap-based buffer over-read and memory disclosure in ajpparsedata CVE-2026-34059 httpd:...

httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check

A flaw was found in the modproxyajp module of httpd. When processing AJP Apache JServ Protocol messages, the server fails to properly check if a string is null-terminated before attempting to read it, allowing an attacker or a malformed request to cause a heap-based buffer over-read. This issue...

CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client...

PT-2026-44997

Name of the Vulnerable Software and Affected Versions Exim versions 4.88 through 4.99.3 Description In certain proxy configurations where SUPPORT PROXY is enabled, the PROXY protocol parser mishandles short payloads before SMTP authentication. This leads to a pre-authentication information...

Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections

Impact Puma is vulnerable to source IP spoofing when setremoteaddress proxyprotocol: :v1 is enabled and persistent connections are used. PROXY protocol v1 is a connection-level protocol. Support was added to Puma in v5.5.0. A proxy sends one PROXY header at the beginning of a TCP connection, befo...

Important: httpd security update

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fixes: httpd: modproxyajp: heap-based buffer over-read and memory disclosure in ajpparsedata CVE-2026-34059 httpd: modproxyajp: heap-based buffer over-read due to missing null-termination...

Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion

Impact PROXY protocol support for Puma was added in version 5.5.0. When PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer. It waits for "\r\n" to determine whether a PROXY v1 line is present. If an attacker opens a TCP connection and continuously sends bytes...

CLSA-2026-1779129626 httpd: Fix of CVE-2026-28780

CVE-2026-28780: modproxyajp: heap-based buffer overflow in ajpmsgcheckheader — message size check did not subtract AJPHEADERLEN, letting a crafted AJP reply write 4 bytes past the end of the heap buffer...

curl: CRLF Injection in HAProxy PROXY Protocol via CURLOPT_HAPROXY_CLIENT_IP allows IP spoofing and protocol injection

Summary: CURLOPTHAPROXYCLIENTIP introduced in curl 8.2.0 accepts arbitrary strings without any validation or sanitization before injecting them into the HAProxy PROXY protocol v1 header. An attacker who can influence the value passed to this option e.g., through a web application that proxies...

BIT-MONGODB-2026-1848 Connections received from the proxy port may not count towards total accepted connections

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

CVE-2026-1848

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

UBUNTU-CVE-2026-1848

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

CVE-2026-1848 Connections received from the proxy port may not count towards total accepted connections

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

CVE-2026-1848 Connections received from the proxy port may not count towards total accepted connections

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

CVE-2026-1848

CVE-2026-1848 affects a MongoDB component where connections received via the proxy port are not counted toward the total accepted connections while the proxy protocol header is pending. This can allow the server to reach resource limits, potentially causing crashes when the total connections exce...

Connections received from the proxy port may not count towards total accepted connections

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

PT-2026-7421

Name of the Vulnerable Software and Affected Versions Connections affected versions not specified Description The system may not accurately count connections received through the proxy port, specifically when a proxy protocol header is present. This can lead to the server exceeding its connection...

CVE-2026-1848: Allocation of Resources Without Limits or Throttling

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header...

ap-proxy-client (>=0.3.0, <=0.8.0), ap-proxy-protocol (>=0.3.0, <=0.8.0) +2 more potentially affected by unknown CVE via ml-dsa (0.0.4)

ml-dsa CARGO version 0.0.4 is affected by a known vulnerability. The following packages have a transitive dependency on ml-dsa and may be impacted: - ap-proxy-client =0.3.0, =0.3.0, =0.1.0, =0.0.1-pre.0, =0.0.12 Source cves: unknown CVE Source advisory: OSV:GHSA-H37V-HP6W-2PP8...

ap-proxy-client (>=0.3.0, <=0.8.0), ap-proxy-protocol (>=0.3.0, <=0.8.0) +2 more potentially affected by CVE-2026-24850 via ml-dsa (0.0.4)

ml-dsa CARGO version 0.0.4 is affected by a known vulnerability. The following packages have a transitive dependency on ml-dsa and may be impacted: - ap-proxy-client =0.3.0, =0.3.0, =0.1.0, =0.0.1-pre.0, =0.0.12 Source cves: CVE-2026-24850 Source advisory: OSV:GHSA-5X2R-HC65-25F9...