Server-Side Request Forgery Vulnerability in GitBucket by GitBucket
CVE-2026-13540

5.3MEDIUM

Key Information:

Vendor

GitBucket

Status
Gitbucket
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13540?

A security flaw has been identified in GitBucket versions up to 4.46.1, specifically affecting the Git.cloneRepository.setURI function within the RepositoryCreationService.scala file. This vulnerability allows attackers to perform server-side request forgery (SSRF) by manipulating the URL argument, potentially leading to unauthorized actions on behalf of the server. The issue can be exploited remotely, thereby posing a significant risk to the affected systems. It is crucial for users to implement the available patch (commit 487a9b980f56aa73b6a044b1e86a92eed5043215) promptly to mitigate this threat.

Affected Version(s)

GitBucket 4.46.0

GitBucket 4.46.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-13540 - Proof of Concept

References

https://vuldb.com/vuln/374548
vdb-entrytechnical-description
https://vuldb.com/vuln/374548/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13540
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

geochen (VulDB User)
.