CVE-2026-32947 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionHarden-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 dns.google. The attack works by encoding sensitive data (e.g., the runner's hostname) as subdomains in DoH queries, which appear as legitimate HTTPS traffic to Harden-Runner's domain-based filtering but are ultimately forwarded to an attacker-controlled domain. This effectively enables data exfiltration without directly connecting to any blocked destination. Exploitation requires the attacker to already have code execution within the GitHub Actions workflow. The issue was fixed in version 2.16.0. Metrics
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CVSS 4.0 Severity and Vector Strings:
CNA: GitHub, Inc.
CVSS-B 4.6 MEDIUM
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
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Quick InfoCVE Dictionary Entry:CVE-2026-32947 NVD Published Date: 03/20/2026 NVD Last Modified: 03/20/2026 Source: GitHub, Inc. |
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