Dashboard / CVE-2026-9132

CVE-2026-9132

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 62/100
Published: 2026-06-30 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: X
AT: Present
VC: High
VI: None
VA: None

Description

A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to read source code from private repositories they did not have access to. The Copilot pull request description diff summary endpoint accepted a cross-repository comparison range and rendered the resulting diff without verifying that the requesting user was authorized to view the target repository. Exploitation required an authenticated account on the instance with read access to at least one repository to use as the comparison base. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, and 3.20.4. This vulnerability was reported via the GitHub Bug Bounty program.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
github enterprise_server < 3.17.17
github enterprise_server 3.18.0 – 3.18.11
github enterprise_server 3.19.0 – 3.19.8
github enterprise_server 3.20.0 – 3.20.4

References & Advisories (4)

Bug Bounty Relevance

62 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

6.0 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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

EPSS — Exploitation Probability

0.41%
Raw Score 0.004150
Percentile 35.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00415
2026-10-28
0.00415

Intelligence Sources

nvd ref →

External Links