9.2

CVE-2026-9312: github enterprise_server Server-Side Request Forgery (SSRF)

CVSS: 9.2v4.0CriticalModified
Published 27-05-2026Last modified 30-06-2026
Open JSON

Vulnerability summary

CVE-2026-9312 is a critical (CVSS 9.2) Server-Side Request Forgery (SSRF) vulnerability in github enterprise_server. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.2/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.59%
0%100%
Low · -5.96 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

Description

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 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.59%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

-5.96 pp

From 6.55% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.59%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github1 product
  • enterprise_server≥ 3.16.0, ≤ 3.16.19 | ≥ 3.17.0, ≤ 3.17.16 | ≥ 3.18.0, ≤ 3.18.10 | ≥ 3.19.0, ≤ 3.19.7 | ≥ 3.20.0, ≤ 3.20.3 | ≥ 3.21.0, < 3.21.1 | ≥ 3.16.0, < 3.16.19 | ≥ 3.17.0, < 3.17.16 | ≥ 3.18.0, < 3.18.10 | ≥ 3.19.0, < 3.19.7 | ≥ 3.20.0, < 3.20.3 | 3.21.1:rc1

1 vendor · 1 product

References

5 links