CVE-2026-104608

Description

A remote code execution vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). babeld held references into internal collections while calling into the SSH library, where a re-entrant callback could modify a collection and invalidate those references. An attacker with an account and SSH access to the instance could leverage this use-after-free into a controlled write and run arbitrary commands as babeld, including disclosure of its environment secrets. Exploitation required per-build memory offsets; failed attempts crashed babeld. This affected all releases prior to 3.23 and was fixed in 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_P
CVSS severity: HIGH
CVSS score: 7.7 / 10
CVSS vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:N/SA:N
Effective score: 7.7 / 10 HIGH source: CNA overview
CWE(s): CWE-416, CWE-1265
Reserved: 2026-10-02
Published: 2026-11-03 22:49 UTC
Last updated: 2026-11-03 22:49 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/104xxx/CVE-2026-104608.json
Linked Threat: CVE-2026-104608 — Use-after-free vulnerability in GitHub Enterprise Server allowed remote code execution in the Git service

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-11-03 23:17:24 UTC
NVD last modified: 2026-11-03 23:17:24 UTC

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-116581
Assigner: GitHub_P
Published: Nov 3, 2026, 10:49:48 PM
Updated: Nov 3, 2026, 10:49:48 PM
EUVD base score (CVSS 4.0): 7.7 / 10
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:N/SA:N
EUVD-reported EPSS: 0.0000
Vendors: GitHub
Products: Enterprise Server (3.22.0 <3.22.*)

Enterprise Server (3.20.0 <3.20.*)

Enterprise Server (3.19.0 <3.19.*)

Enterprise Server (3.21.0 <3.21.*)
Aliases: GHSA-8r7w-x58w-955w

ENISA description: A remote code execution vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). babeld held references into internal collections while calling into the SSH library, where a re-entrant callback could modify a collection and invalidate those references. An attacker with an account and SSH access to the instance could leverage this use-after-free into a controlled write and run arbitrary commands as babeld, including disclosure of its environment secrets. Exploitation required per-build memory offsets; failed attempts crashed babeld. This affected all releases prior to 3.23 and was fixed in 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
GitHub	Enterprise Server	`3.19.0` (affected), `3.20.0` (affected), `3.21.0` (affected), `3.22.0` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14 release-notes
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10 release-notes
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8 release-notes
https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3 release-notes

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14 product-cna@github.com
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10 product-cna@github.com
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8 product-cna@github.com
https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3 product-cna@github.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-11-04 09:58 UTC
Cisco Meraki Security Hardening Release: October 2026

web:sec.cloudapps.cisco.com

As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching ...

2026-11-04 09:58 UTC
Microsoft Patch Tracker (October 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-11-04 09:58 UTC
Android Security and Update Bulletins | Android Open Source Project

web:source.android.com

This Section contains the available Android Security Bulletins, which provide fixes for possible issues affecting Android devices.

2026-11-04 09:58 UTC
[Security Advisory] October 2026 CVE Advisory Notification

web:support.servicenow.com

On October 29, 2026 , ServiceNow issued CVE - 2026 -103093, CVE - 2026 -103094, and CVE - 2026 -6877. Each of these security issues was identified through internal security testing, customer security assessments, or reports submitted through ServiceNow's responsible disclosure and bug bounty programs and was remediated independently. For security issues identified through responsible disclosure ...

2026-11-04 09:58 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

None of these is a clean fix , which is why the decision on how to remediate depends on knowing what package versions are running in production and why. This post will cover how AI has accelerated CVE detection and discovery, the upgrade trap, what CVE remediation actually involves in 2026 , and how to solve the CVE remediation problem.

2026-11-04 09:58 UTC
National Vulnerability Database | NIST

web:www.nist.gov

NIST maintains the National Vulnerability Database (NVD), a repository of information on software and hardware flaws that can compromise computer security. This is a key piece of the nation's cybersecurity infrastructure.

2026-11-04 09:58 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-11-04 09:58 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-11-04 09:58 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-04 09:58 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-104608.json.

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