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
Elevated
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)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
13.5%
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 8× in last 7d / 51× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 21:17 UTCGHSA enrichment
  11. 2026-07-16 17:02 UTCEPSS rescore
  12. 2026-07-15 21:48 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-14 22:20 UTCGHSA enrichment
  16. 2026-07-13 22:54 UTCGHSA enrichment
  17. 2026-07-13 06:12 UTCEPSS rescore
  18. 2026-07-12 23:28 UTCGHSA enrichment
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-12 00:02 UTCGHSA enrichment
  21. 2026-07-11 08:27 UTCEPSS rescore
  22. 2026-07-11 00:36 UTCGHSA enrichment
  23. 2026-07-10 01:07 UTCGHSA enrichment
  24. 2026-07-09 19:10 UTCEPSS rescore
  25. 2026-07-09 01:42 UTCGHSA enrichment
Show 26 more
  1. 2026-07-08 15:15 UTCEPSS rescore
  2. 2026-07-08 15:15 UTCEPSS rescore
  3. 2026-07-08 02:06 UTCGHSA enrichment
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-07 02:40 UTCGHSA enrichment
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 03:14 UTCGHSA enrichment
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 03:42 UTCGHSA enrichment
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 04:14 UTCGHSA enrichment
  14. 2026-07-03 04:47 UTCGHSA enrichment
  15. 2026-07-02 05:20 UTCGHSA enrichment
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 05:55 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 06:28 UTCGHSA enrichment
  21. 2026-06-29 15:26 UTCNVD updateCVSS v4 → 2.1
  22. 2026-06-29 14:52 UTCMITRE cvelistV5CVSS v4 → 5.3
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 08:04 UTCNVD updateCVSS v4 → 2.1
  25. 2026-06-29 07:02 UTCEG score recompute
  26. 2026-06-29 07:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 13.5% 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

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