httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data()

A flaw was found in the modproxyajp module of httpd. When processing AJP Apache JServ Protocol messages, the ajpparsedata function attempts to read data beyond the allocated buffer size, allowing an attacker or a malformed request to cause a heap-based buffer over-read. This issue potentially lea...

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : Apache HTTP Server vulnerabilities (USN-8396-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8396-1 advisory. It was discovered that the Apache HTTP Server modrewrite module incorrectly handled certain privileges. A local...

httpd security update

An update is available for httpd. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The httpd packages provide the Apache HTTP Server, a powerful, efficient, and...

RLSA-2026:21391 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...

RockyLinux 9 : httpd (RLSA-2026:21391)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:21391 advisory. httpd: modproxyajp: heap-based buffer over-read and memory disclosure in ajpparsedata CVE-2026-34059 httpd: modproxyajp: heap-based buffer over-read due...

SUSE-SU-2026:2103-1 Security update for apache2

This update for apache2 fixes the following issues - CVE-2026-23918: http2: double free and possible RCE on early reset bsc1263957. - CVE-2026-24072: modrewrite elevation of privileges via apexpr bsc1263935. - CVE-2026-28780: heap buffer overflow in modproxyajp via ajpmsgcheckheader bsc1264163. -...

RHEL 9 : httpd (RHSA-2026:21391)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:21391 advisory. The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fixes: httpd: modproxyajp:...

Important: Red Hat Security Advisory: httpd security update

An update for httpd is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow

A flaw was found in modproxyajp of Apache HTTP Server. This heap-based buffer overflow vulnerability allows a remote attacker, by connecting to a malicious AJP Apache JServ Protocol server, to send a specially crafted message. This message can cause modproxyajp to write attacker-controlled data...

ALSA-2026:21433 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...

ALSA-2026:21391 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...

Important: httpd

Issue Overview: An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local .htaccess authors to read files with the privileges of the httpd user. Users are recommended to upgrade to version 2.4.67, which fixes this issue. CVE-2026-24072 Heap-based Buffer...

CLSA-2026-1779296292 httpd: Fix of 5 CVEs

CVE-2026-28780: modproxyajp 4-byte heap buffer overflow when contacting a malicious AJP backend off-by-AJPHEADERLEN check in ajpmsgcheckheader - CVE-2026-34059: modproxyajp heap over-read in ajpparsedata on short AJP replies - CVE-2026-33006: modauthdigest used non-constant-time strcmp for...

CLSA-2026-1779118869 Fix of 8 CVEs

SECURITY UPDATE: fix off-by-one out-of-bounds read in modproxyajp message getter functions - debian/patches/CVE-2026-33857-prereq.patch: prerequisite fix for ajpmsgcheckheader bounds check to keep msg-len within buffer - debian/patches/CVE-2026-33857.patch: fix off-by-one out-of-bounds read in...

CLSA-2026-1779129849 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...

CLSA-2026-1778789568 httpd: Fix of CVE-2022-36760

CVE-2022-36760: modproxyajp: fix possible request smuggling via invalid Transfer-Encoding...

CVE-2026-34032

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...

Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)

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USN-8239-1 apache2 vulnerabilities

Bartlomiej Dmitruk and Stanislaw Strzalkowski discovered that Apache HTTP Server incorrectly handled certain memory operations when using the HTTP/2 protocol. A remote attacker could use this issue to cause Apache HTTP Server to crash, resulting in a denial of service, or possibly execute arbitra...

ALPINE-CVE-2026-28780

Heap-based Buffer Overflow vulnerability in modproxyajp of Apache HTTP Server. If modproxyajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to modproxyajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer. This issue...