| Summary | A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request parameters, an attacker could bypass the intended request flow and redirect internal API calls, potentially accessing internal services and exposing sensitive credentials. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.1. This vulnerability was reported via the GitHub Bug Bounty program. |
|---|---|
| Publication Date | May 27, 2026, 9:16 a.m. |
| Registration Date | May 28, 2026, 4:09 a.m. |
| Last Update | June 3, 2026, 3:31 a.m. |
| CVSS3.1 : HIGH | |
| スコア | 8.2 |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| 攻撃元区分(AV) | ネットワーク |
| 攻撃条件の複雑さ(AC) | 低 |
| 攻撃に必要な特権レベル(PR) | 不要 |
| 利用者の関与(UI) | 不要 |
| 影響の想定範囲(S) | 変更なし |
| 機密性への影響(C) | 高 |
| 完全性への影響(I) | 低 |
| 可用性への影響(A) | なし |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.16.0 | 3.16.19 | |||
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.17.0 | 3.17.16 | |||
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.18.0 | 3.18.10 | |||
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.19.0 | 3.19.7 | |||
| cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* | 3.20.0 | 3.20.3 | |||
| cpe:2.3:a:github:enterprise_server:3.21.1:rc1:*:*:*:*:*:* | |||||