Github
CVE-2026-0573
CRITICAL
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to GitHub Enterprise Server
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DeliveryCraft malicious repository_pages API request with attacker-controlled redirect URL
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ExploitServer follows redirect while preserving JWT authorization header
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ExecutionExfiltrate Actions.ManageOrgs JWT token
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ImpactUse stolen JWT for remote code execution
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Redirect URL validation
MITRE ATT&CK
1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Authenticated user access to GitHub Enterprise Server instance with repository_pages API enabled; ability to control artifact URLs or inject redirect targets in API responses; victim must click or trigger the crafted request via UI interaction |
| Impact | CVSS 9.0. GitHub Enterprise is trusted by developers — open redirect enables highly convincing phishing attacks. |
| Exploit ScenarioDerived | Attacker crafts URL on the company's GitHub Enterprise domain that redirects to a phishing page mimicking the login, steals developer credentials or SSO tokens. |
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Alert meAnalysisAIv1 – Mar 12, 2026
URL redirection vulnerability in GitHub Enterprise Server allows attacker-controlled redirects through crafted URLs, potentially enabling credential theft via phishing.
Earlier versions of this analysis (1)
Open redirect in GitHub Enterprise Server.
RemediationAI
Apply GitHub Enterprise Server update. Implement strict redirect URL validation.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
CWE-601 open redirect. Crafted URLs can redirect authenticated users to attacker-controlled sites while appearing to originate from the trusted GitHub Enterprise domain.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
DescriptionGitHub Advisory
An URL redirection vulnerability was identified in GitHub Enterprise Server that allowed attacker-controlled redirects to leak sensitive authorization tokens. The repository_pages API insecurely followed HTTP redirects when fetching artifact URLs, preserving the authorization header containing a privileged JWT. An authenticated user could redirect these requests to an attacker-controlled domain, exfiltrate the Actions.ManageOrgs JWT, and leverage it for potential remote code execution. Attackers would require access to the target GitHub Enterprise Server instance and the ability to exploit a legacy redirect to an attacker-controlled domain. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.19 and was fixed in versions 3.19.2, 3.18.4, 3.17.10, 3.16.13, 3.15.17, and 3.14.22. This vulnerability was reported via the GitHub Bug Bounty program.
Executive ViewAI
A critical vulnerability in GitHub Enterprise Server allows authenticated attackers to steal privileged authorization tokens through malicious URL redirects, potentially enabling unauthorized access to organizational repositories and remote code execution. This directly threatens any organization using GitHub Enterprise Server, particularly those with sensitive intellectual property or CI/CD automation.
Disable repository_pages API if unused; implement WAF rules to detect and block HTTP redirect chains; restrict API access via network segmentation and IP allowlisting; enforce token rotation for all GitHub Actions service accounts; implement request inspection to detect authorization header leakage; monitor API logs for unusual redirect activity; require MFA for all privileged GitHub Enterprise accounts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
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