CVE-2026-13540

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-06-29. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.3
EG Score
6.3(high)
EPSS
13.3%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (4)

Auto-updated Jun 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
github_pr

Private address blocking and IP whitelist for cloning repository

Fix merged in gitbucket/gitbucket PR #4056 on 2026-06-20 — awaiting tagged release

https://github.com/gitbucket/gitbucket/pull/4056
generic

[Security] SSRF via Unchecked Git Clone URL in Repository Creation · Issue #4044 · gitbucket/gitbucket · GitHub

https://github.com/gitbucket/gitbucket/issues/4044
github_commit

commit 487a9b980f56 (gitbucket/gitbucket)

Fix landed in gitbucket/gitbucket commit 487a9b980f56 — awaiting tagged release

https://github.com/gitbucket/gitbucket/commit/487a9b980f56aa73b6a044b1e86a92eed5043215
generic

GitHub - gitbucket/gitbucket: A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility · GitHub

https://github.com/gitbucket/gitbucket/

Vendor Advisories for CVE-2026-13540(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 24× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 02:40 UTCEG score recompute
  2. 2026-07-07 02:40 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 03:14 UTCEG score recompute
  5. 2026-07-06 03:14 UTCGHSA enrichment
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 03:42 UTCEG score recompute
  8. 2026-07-05 03:42 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-04 04:14 UTCEG score recompute
  13. 2026-07-04 04:14 UTCGHSA enrichment
  14. 2026-07-03 04:47 UTCEG score recompute
  15. 2026-07-03 04:47 UTCGHSA enrichment
  16. 2026-07-02 05:20 UTCEG score recompute
  17. 2026-07-02 05:20 UTCGHSA enrichment
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-07-01 05:55 UTCEG score recompute
  21. 2026-07-01 05:55 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 06:28 UTCEG score recompute
  24. 2026-06-30 06:28 UTCGHSA enrichment
  25. 2026-06-29 15:26 UTCNVD updateCVSS v4 → 2.1
Show 5 more
  1. 2026-06-29 14:52 UTCMITRE cvelistV5CVSS v4 → 5.3
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-29 08:04 UTCNVD updateCVSS v4 → 2.1
  4. 2026-06-29 07:02 UTCEG score recompute
  5. 2026-06-29 07:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-13540?
CVE-2026-13540 is a medium vulnerability published on June 29, 2026. 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…
When was CVE-2026-13540 disclosed?
CVE-2026-13540 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13540 actively exploited?
CVE-2026-13540 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-13540?
CVE-2026-13540 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-13540?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13540, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-13540

Explore →

Is Your Infrastructure Affected by CVE-2026-13540?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs