EUVD-2026-69714
GHSA-xh7g-7v3x-h73p
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible unauthenticated trigger (AV:N, PR:N) but token capture requires interception positioning (AC:H); impact is confidentiality-only per vendor CVSS 4.0 metrics (VC:H, VI:N, VA:N).
Primary rating from Vendor (GitHub_P).
CVSS VectorVendor: GitHub_P
Lifecycle Timeline
2DescriptionCVE.org
A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster configuration and issued gateway-to-agent requests whose HMAC authenticated only a timestamp, not the request path or body. An attacker positioned to intercept the outbound request could capture this token and replay it against privileged management agent endpoints. High-availability deployments were not affected due to a topology restriction. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.19, 3.18.13, 3.19.10, 3.20.6, and 3.21.4. This vulnerability was reported via the GitHub Bug Bounty program.
AnalysisAI
SSRF in GitHub Enterprise Server (all versions prior to 3.22) allows unauthenticated network attackers to force the Manage API to issue gateway-to-agent requests toward an attacker-controlled host, and - by intercepting those outbound requests - capture a weakly-scoped HMAC token replayable against privileged management agent endpoints. The flaw arises from an unauthenticated cluster-configuration parsing endpoint combined with an HMAC scheme that signs only a timestamp, leaving request paths and bodies unsigned and the captured token replayable with arbitrary content. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target GHES instance must be deployed in a non-high-availability topology - HA deployments are explicitly not vulnerable due to routing differences that prevent the affected endpoint from being reachable in the management flow. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 score of 8.2 (AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N) accurately reflects the dual nature of the attack: no authentication is needed to trigger the outbound SSRF, but AT:P - specific attack requirements present - captures the prerequisite that token capture demands network interception capability, a meaningful barrier in well-segmented enterprise environments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to a patched release immediately: GitHub Enterprise Server 3.17.19, 3.18.13, 3.19.10, 3.20.6, or 3.21.4, as documented in the official GitHub Enterprise Server release notes linked in the references for each branch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all GHE instances and verify their versions; implement network-level restrictions on cluster-configuration endpoints if patching cannot be completed immediately. …
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External POC / Exploit Code
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