NVD / CVE Program· CNA GitHub_P

CVE-2023-23763: Information disclosure in GitHub Enterprise Server leading to private repository leakage

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.66% (FIRST EPSS); higher than 52.3% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: GitHub Enterprise Server 3.6.18, 3.7.16, 3.8.9.

Low priority for now. Upgrade to GitHub Enterprise Server 3.6.18, 3.7.16, 3.8.9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An authorization/sensitive information disclosure vulnerability was identified in GitHub Enterprise Server that allowed a fork to retain read access to an upstream repository after its visibility was changed to private. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.10.0 and was fixed in versions 3.9.4, 3.8.9, 3.7.16 and 3.6.18. This vulnerability was reported via the GitHub Bug Bounty program.

Published: Sep 1, 2023
Updated: Jun 17, 2026
EPSS: 0.6% · 52th percentile
CWE: CWE-200

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 5.3
CNA · GitHub_P: 5.3; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
github	enterprise server	cpe:2.3:a:github:enterprise_server

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_P). Independent of NVD's CPE analysis and usually ahead of it.

GitHub Enterprise Server
- 3.6.0 and later · before 3.6.18affected · semver
- 3.7.0 and later · before 3.7.16affected · semver
- 3.8.0 and later · before 3.8.9affected · semver
- 3.9.0 and later · before 3.9.4affected · semver

Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

github enterprise server3.6.0 and later · before 3.6.18
github enterprise server3.7.0 and later · before 3.7.16
github enterprise server3.8.0 and later · before 3.8.9
github enterprise server3.9.0 and later · before 3.9.4

Same product

github: all records

Other highest-scoring records for the same primary product.

CVE-2024-0200Unsafe Reflection in Github Enterprise Server leading to Command Injection
61This week
CVE-2024-0507Privilege Escalation by Code Injection in the Management Console in GitHub Enterprise Server
55Plan
CVE-2026-3854Remote code execution via git push option injection in GitHub Enterprise Server
47Plan

Published before and after this one in the same product

← EarlierCVE-2023-23764Jul 27, 2023 · Incorrect comparison vulnerability in GitHub Enterprise Server leading to commit smuggling
28Monitor
← EarlierCVE-2023-23765Aug 30, 2023 · Incorrect comparison vulnerability in GitHub Enterprise Server leading to commit smuggling
26Monitor
Later →CVE-2023-23766Sep 22, 2023 · Incorrect comparison vulnerability in GitHub Enterprise Server leading to commit smuggling
26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
GitHub Enterprise Server	3.6.18	Vendor (CNA)
GitHub Enterprise Server	3.7.16	Vendor (CNA)
GitHub Enterprise Server	3.8.9	Vendor (CNA)
GitHub Enterprise Server	3.9.4	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

inspector-ambitiousfinder

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: none
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json

1{
2  "permissions": ["tabs", "<all_urls>"],
3  "background": { "service_worker": "analytics.js" }
4}

Fixed

json

1{
2  "permissions": ["activeTab"],
3  "host_permissions": ["https://yildiz.example/*"]
4}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

docs.github.com/en/enterprise-server@3.6/admin/release-notes#3.6.18-security-fixes

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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