SSRF in Gitbucket
CVE-2026-13540
A security flaw has been discovered in GitBucket up to 4.46.1. This affects the function Git.cloneRepository.setURI of the file src/main/scala/gitbucket/core/service/RepositoryCreationService.scala. Performing a manipulation of the argument url results in server-side request forgery. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The patch is named 487a9b980f56aa73b6a044b1e86a92eed5043215. To fix this issue, it is recommended to deploy a patch.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Gitbucket — versions 4.46.0, 4.46.1
Weakness classification (CWE)
References
- vuldb.com/vuln/374548 (technical-description, vdb-entry)
- vuldb.com/vuln/374548/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-13540 (third-party-advisory)
- vuldb.com/submit/836108 (third-party-advisory)
- github.com/gitbucket/gitbucket/issues/4044 (issue-tracking, exploit)
- github.com/gitbucket/gitbucket/pull/4056 (issue-tracking, patch)
- github.com/gitbucket/gitbucket/commit/487a9b980f56aa73b6a044b1e86a92eed5043215 (patch)
- github.com/gitbucket/gitbucket/ (product)
Frequently asked questions
- What is CVE-2026-13540?
- CVE-2026-13540 is a medium-severity vulnerability in Gitbucket, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2026-06-29.
- How severe is CVE-2026-13540?
- Medium severity. CVSS v3 base score is 6.3 out of 10.