TI-2017-13538 Aliases CVE-2017-18365 GHSA-cg2q-c8hj-pqc3

The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization…

MEDIUM 61CWE-502Published 2019-03-28 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-502.

Summary

The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code. This occurs because the enterprise session secret is always the same, and can be found in the product's source code. By sending a crafted cookie signed with this secret, one can call Marshal.load with arbitrary data, which is a problem because the Marshal data format allows Ruby objects.

Why it matters now

EPSS 0.21238 97th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:github:github:::::enterprise:::*	2.8.0 to before 2.8.7	Vulnerable	GitHub
cpe:2.3:a:github:github:2.8.7:::::::*	2.8.7	Vulnerable	GitHub

cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:* Versions 2.8.0 to before 2.8.7 Vulnerable ·GitHub
cpe:2.3:a:github:github:2.8.7:*:*:*:*:*:*:* Versions 2.8.7 Vulnerable ·GitHub

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-18365
2026-10-03 Alias added: GHSA-cg2q-c8hj-pqc3

References

Exploit 1

https://www.exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.html

Advisory 1

https://enterprise.github.com/releases/2.8.7/notes

TI-2020-08450 Improper access control in GitHub Enterprise Server leading to privilege escalation of organization member CVSS 3.1CRITICAL 9.8
TI-2020-08453 Unsafe configuration options in GitHub Pages leading to remote code execution on GitHub Enterprise Server CVSS 3.1HIGH 8.8
TI-2020-08452 Unsafe configuration options in GitHub Pages leading to remote code execution on GitHub Enterprise Server CVSS 3.1HIGH 8.8
TI-2021-05724 Improper authorization in GitHub Enterprise Server CVSS 3.1HIGH 8.1
TI-2012-01828 GitHub Enterprise before 20120304 does not properly restrict the use of a hash to provide… CVSS 3.1HIGH 7.5
TI-2021-05722 Improper access control in GitHub Enterprise Server leading to unauthorized write access to forkable repositories CVSS 3.1MEDIUM 6.5

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences