Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall

Impact There is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up goroutines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many...

CVE-2026-22045 Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the...

CVE-2026-22045

Summary: CVE-2026-22045 affects Traefik’s ACME TLS-ALPN fast path. When ACME TLS challenge is enabled, an unauthenticated client can open many connections and stall the ClientHello with acme-tls/1, causing goroutines and file descriptors to be tied up indefinitely and leading to DoS at the entryp...

CVE-2026-22045

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the...

Traefik security vulnerabilities

Traefik is an open-source reverse proxy and load balancing tool developed by Traefik. Versions prior to Traefik 2.11.35 and 3.6.7 contained security vulnerabilities. These vulnerabilities stemmed from potential issues with the automatic generation of ACME TLS certificates, which could lead to...

OPENSUSE-SU-2026:20030-1 Security update for apache2

This update for apache2 fixes the following issues: - CVE-2025-55753: Fixed modmd ACME, unintended retry intervals bsc1254511 - CVE-2025-58098: Fixed Server Side Includes adds query string to exec cmd bsc1254512 - CVE-2025-65082: Fixed CGI environment variable override bsc1254514 - CVE-2025-66200...

CVE-2018-18778

ACME minihttpd before 1.30 lets remote users read arbitrary files...

mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals

An integer overflow flaw has been discovered in the Apache HTTP server. The integer overflow in the case of failed ACME certificate renewal leads, after a number of failures 30 days in default configurations, to the backoff timer becoming 0. Attempts to renew the certificate then are repeated...

Important: Red Hat Security Advisory: mod_md security update

An update for modmd is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. 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...

RHEL 9 : mod_md (RHSA-2026:0094)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0094 advisory. This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate...

RHEL 9 : mod_md (RHSA-2026:0092)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0092 advisory. This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate...

CLSA-2026-1767629031 mod_md: Fix of CVE-2025-55753

CVE-2025-55753: fix integer overflow in ACME backoff timer - Fix test failure on i686 for boolean refcount assertion...

Important: Red Hat Security Advisory: mod_md security update

An update for modmd is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. 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...

mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals

An integer overflow flaw has been discovered in the Apache HTTP server. The integer overflow in the case of failed ACME certificate renewal leads, after a number of failures 30 days in default configurations, to the backoff timer becoming 0. Attempts to renew the certificate then are repeated...

Important: Red Hat Security Advisory: mod_md security update

An update for modmd is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. 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...

mod_md: Apache HTTP Server: mod_md (ACME), unintended retry intervals

An integer overflow flaw has been discovered in the Apache HTTP server. The integer overflow in the case of failed ACME certificate renewal leads, after a number of failures 30 days in default configurations, to the backoff timer becoming 0. Attempts to renew the certificate then are repeated...

RHEL 9 : mod_md (RHSA-2026:0029)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0029 advisory. This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate...

RHEL 9 : mod_md (RHSA-2026:0030)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:0030 advisory. This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate...

RHEL 8 : httpd:2.4 (RHSA-2026:0009)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0009 advisory. The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fixes: modmd: Apache HTTP...

RHEL 8 : httpd:2.4 (RHSA-2026:0011)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0011 advisory. The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fixes: modmd: Apache HTTP...