CVE-2026-24029

When the earlyacldrop earlyACLDrop in Lua option is disabled default is enabled on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL...

CVE-2026-24029 DNS over HTTPS ACL bypass

When the earlyacldrop earlyACLDrop in Lua option is disabled default is enabled on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL...

CVE-2026-24029

When the earlyacldrop earlyACLDrop in Lua option is disabled default is enabled on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL...

CVE-2026-32947

A flaw was found in Harden-Runner. A remote attacker with existing code execution within a GitHub Actions workflow could exploit a DNS over HTTPS DoH vulnerability to bypass network restrictions. This allows for the exfiltration of sensitive data by encoding it within DoH queries, which appear as...

EUVD-2026-13539

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, a DNS over HTTPS DoH vulnerability allows attackers to bypass egress-policy: block network restrictions by tunneling exfiltrated data through permitted HTTPS endpoints like...

CVE-2026-32947

Harden-Runner (CI/CD security agent for GitHub Actions runners) versions 2.15.1 and earlier are affected by a DNS over HTTPS (DoH) vulnerability that enables data exfiltration through permitted HTTPS endpoints by encoding data (e.g., hostname) in DoH subdomains. The attack requires the attacker t...

CVE-2026-32947 Egress Policy Bypass via DNS over HTTPS (DoH) in Harden-Runner (Community Tier)

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, a DNS over HTTPS DoH vulnerability allows attackers to bypass egress-policy: block network restrictions by tunneling exfiltrated data through permitted HTTPS endpoints like...

CVE-2026-32947 Egress Policy Bypass via DNS over HTTPS (DoH) in Harden-Runner (Community Tier)

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. In versions 2.15.1 and below, a DNS over HTTPS DoH vulnerability allows attackers to bypass egress-policy: block network restrictions by tunneling exfiltrated data through permitted HTTPS endpoints like...

Egress Policy Bypass via DNS over HTTPS (DoH) in Harden-Runner (Community Tier)

Summary A vulnerability exists in the Community Tier of Harden-Runner that allows bypassing the egress-policy: block network restriction using DNS over HTTPS DoH. Harden-Runner secures GitHub Actions workflows on runners by applying network policies, including an allowed-endpoints configuration...

PT-2026-25988

Name of the Vulnerable Software and Affected Versions Harden-Runner versions 2.15.1 and below Description Harden-Runner, a CI/CD security agent functioning as an EDR for GitHub Actions runners, contains a DNS over HTTPS DoH issue. This allows attackers to circumvent network restrictions imposed b...

SUSE-SU-2026:0888-1 Security update for dnsdist

This update for dnsdist fixes the following issues: Update to dnsdist 1.9.11: - CVE-2025-8671: Add mitigations for the HTTP/2 MadeYouReset attack bsc1253852. - CVE-2025-30187: denial of service via crafted DoH exchange bsc1250054...

UAT-10027 Targets U.S. Education and Healthcare with Dohdoor Backdoor

A previously undocumented threat activity cluster has been attributed to an ongoing malicious campaign targeting education and healthcare sectors in the U.S. since at least December 2025. The campaign is being tracked by Cisco Talos under the moniker UAT-10027. The end goal of the attacks is to...

New Dohdoor malware campaign targets education and health care

Cisco Talos discovered an ongoing malicious campaign since at least as early as December 2025 by a threat actor we track as "UAT-10027," delivering a previously undisclosed backdoor dubbed "Dohdoor." Dohdoor utilizes the DNS-over-HTTPS DoH technique for command-and-control C2 communications and h...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : DNSdist vulnerabilities (USN-8037-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8037-1 advisory. It was discovered that HTTP/2, which is used/vendored by DNSdist, did not properly account for resources when handling client-trigger...

USN-8037-1 dnsdist vulnerabilities

It was discovered that HTTP/2, which is used/vendored by DNSdist, did not properly account for resources when handling client-triggered stream resets. An attacker could possibly use this issue to cause a denial of service. CVE-2025-8671 It was discovered that DNSdist did not properly manage memor...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS via the DNS cache. An attacker can cause the controller to panic and become unavailable by inserting a specially crafted DNS response into the cache, either by intercepting and modifying DNS traffic or by controlli...

PT-2026-6430

Impact The cert-manager-controller performs DNS lookups during ACME DNS-01 processing for zone discovery and propagation self-checks. By default, these lookups use standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-controller pod can insert a...

Azure Linux 3.0 Security Update: bind (CVE-2024-12705)

The version of bind installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-12705 advisory. - Clients using DNS-over-HTTPS DoH can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted...

Evasion-Resilient Detection of DNS-Over-HTTPS Data Exfiltration: A Practical Evaluation and Toolkit

The purpose of this project is to assess how well defenders can detect DNS-over-HTTPS DoH file exfiltration, and which evasion strategies can be used by attackers. While providing a reproducible toolkit to generate, intercept and analyze DoH exfiltration, and comparing Machine Learning vs...

CISA Reports PRC Hackers Using BRICKSTORM for Long-Term Access in U.S. Systems

The U.S. Cybersecurity and Infrastructure Security Agency CISA on Thursday released details of a backdoor named BRICKSTORM that has been put to use by state-sponsored threat actors from the People's Republic of China PRC to maintain long-term persistence on compromised systems. "BRICKSTORM is a...