vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2023-23761

Improper authentication vulnerability in GitHub Enterprise Server leading to modification of secret gists

MEDIUM
5.3
CVSS Score
Published: April 7, 2023 at 06:41 PM UTC
Updated: June 17, 2026 at 05:37 AM UTC
1 product affected across 1 vendorGitHub Enterprise Server

Using Enterprise Server by GitHub?

Get instant alerts when new vulnerabilities affect Enterprise Server - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

An improper authentication vulnerability was identified in GitHub Enterprise Server that allowed an unauthorized actor to modify other users' secret gists by authenticating through an SSH certificate authority. To do so, a user had to know the secret gist's URL. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.9 and was fixed in versions 3.4.18, 3.5.15, 3.6.11, 3.7.8, and 3.8.1. This vulnerability was reported via the GitHub Bug Bounty program.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GitHub Enterprise Server· GitHubgithub-action
95%
v < 3.4.183.4.0 ≤ v ≤ 3.4.173.5.0 ≤ v ≤ 3.5.143.5.0 ≤ v < 3.5.153.6.0 ≤ v ≤ 3.6.103.6.0 ≤ v < 3.6.113.7.0 ≤ v ≤ 3.7.73.7.0 ≤ v < 3.7.83.8.0 ≤ v < 3.8.13.4.03.5.03.6.03.7.03.8.0
Affected range stops below 3.4.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.7.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.8.1, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 3.9.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Release Notes
Source: [email protected]
https://docs.github.com/en/[email protected]/admin/release-notes#3.4.18
Release Notes
Source: [email protected]
https://docs.github.com/en/[email protected]/admin/release-notes#3.5.15
Release Notes
Source: [email protected]
https://docs.github.com/en/[email protected]/admin/release-notes#3.6.11
Release Notes
Source: [email protected]
https://docs.github.com/en/[email protected]/admin/release-notes#3.7.8
Release Notes
Source: [email protected]
https://docs.github.com/en/[email protected]/admin/release-notes#3.8.1

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card