SEPTEMBER 17, 2026
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Case File

CVE-2026-18730

HIGH · CVSS 7.4 EPSS 0.29% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

GitHub Enterprise Server versions prior to 3.22 are vulnerable to a server-side request forgery (SSRF) that allows unauthenticated attackers to manipulate the Manage API into sending crafted requests to an external host. This could enable attackers to intercept and replay tokens against privileged management agent endpoints, potentially compromising sensitive data. Organizations using affected versions should prioritize patching to mitigate this high-severity vulnerability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-18730
Severity
HIGH
CVSS
7.4
EPSS
0.29%
GitHub

Original NVD Description

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.

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