CVE-2026-13540

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM 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
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 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(medium)
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 PROB
0%
EPSS %ILE
31%
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 / 49× 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.

Showing the most recent 100 of 153 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-11 09:36 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 14:47 UTCEG score recompute
  7. 2026-09-06 14:47 UTCGHSA enrichment
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:11 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-09-01 04:39 UTCEPSS rescore
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 18:58 UTCEG score recompute
  15. 2026-08-30 18:58 UTCGHSA enrichment
  16. 2026-08-30 01:21 UTCEPSS rescore
  17. 2026-08-28 21:40 UTCEPSS rescore
  18. 2026-08-27 22:49 UTCEG score recompute
  19. 2026-08-27 22:49 UTCGHSA enrichment
  20. 2026-08-27 14:24 UTCEPSS rescore
  21. 2026-08-25 13:48 UTCEPSS rescore
  22. 2026-08-24 12:41 UTCEG score recompute
  23. 2026-08-24 12:41 UTCGHSA enrichment
  24. 2026-08-23 08:33 UTCGHSA enrichment
  25. 2026-08-22 09:08 UTCEG score recompute
Show 75 more
  1. 2026-08-22 09:08 UTCGHSA enrichment
  2. 2026-08-21 23:48 UTCEPSS rescore
  3. 2026-08-21 05:21 UTCEG score recompute
  4. 2026-08-21 05:21 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 05:55 UTCEG score recompute
  7. 2026-08-20 05:55 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-18 23:22 UTCEG score recompute
  10. 2026-08-18 23:22 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 13:34 UTCEG score recompute
  13. 2026-08-17 13:34 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 14:08 UTCEG score recompute
  16. 2026-08-16 14:08 UTCGHSA enrichment
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 14:43 UTCEG score recompute
  19. 2026-08-15 14:43 UTCGHSA enrichment
  20. 2026-08-15 01:30 UTCEPSS rescore
  21. 2026-08-14 15:17 UTCEG score recompute
  22. 2026-08-14 15:17 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 15:51 UTCGHSA enrichment
  25. 2026-08-12 16:00 UTCEG score recompute
  26. 2026-08-12 16:00 UTCGHSA enrichment
  27. 2026-08-12 13:50 UTCEPSS rescore
  28. 2026-08-11 16:34 UTCEG score recompute
  29. 2026-08-11 16:34 UTCGHSA enrichment
  30. 2026-08-11 13:42 UTCEPSS rescore
  31. 2026-08-10 23:59 UTCEPSS rescore
  32. 2026-08-10 17:09 UTCGHSA enrichment
  33. 2026-08-09 17:31 UTCEG score recompute
  34. 2026-08-09 17:31 UTCGHSA enrichment
  35. 2026-08-09 13:46 UTCEPSS rescore
  36. 2026-08-08 18:06 UTCEG score recompute
  37. 2026-08-08 18:06 UTCGHSA enrichment
  38. 2026-08-08 16:37 UTCEPSS rescore
  39. 2026-08-07 18:40 UTCEG score recompute
  40. 2026-08-07 18:40 UTCGHSA enrichment
  41. 2026-08-06 19:15 UTCEG score recompute
  42. 2026-08-06 19:15 UTCGHSA enrichment
  43. 2026-08-06 13:46 UTCEPSS rescore
  44. 2026-08-05 19:49 UTCEG score recompute
  45. 2026-08-05 19:49 UTCGHSA enrichment
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-04 20:24 UTCEG score recompute
  48. 2026-08-04 20:24 UTCGHSA enrichment
  49. 2026-08-04 15:09 UTCEPSS rescore
  50. 2026-08-04 10:38 UTCEPSS rescore
  51. 2026-08-03 20:55 UTCEG score recompute
  52. 2026-08-03 20:55 UTCGHSA enrichment
  53. 2026-08-03 10:35 UTCEPSS rescore
  54. 2026-08-02 21:29 UTCEG score recompute
  55. 2026-08-02 21:29 UTCGHSA enrichment
  56. 2026-08-02 02:26 UTCEPSS rescore
  57. 2026-08-01 22:04 UTCEG score recompute
  58. 2026-08-01 22:04 UTCGHSA enrichment
  59. 2026-08-01 04:15 UTCEPSS rescore
  60. 2026-07-31 22:38 UTCGHSA enrichment
  61. 2026-07-30 23:08 UTCEG score recompute
  62. 2026-07-30 23:08 UTCGHSA enrichment
  63. 2026-07-30 16:27 UTCEPSS rescore
  64. 2026-07-30 01:30 UTCEPSS rescore
  65. 2026-07-29 23:41 UTCEG score recompute
  66. 2026-07-29 23:41 UTCGHSA enrichment
  67. 2026-07-28 19:54 UTCEG score recompute
  68. 2026-07-28 19:54 UTCGHSA enrichment
  69. 2026-07-28 15:36 UTCEPSS rescore
  70. 2026-07-27 16:58 UTCEG score recompute
  71. 2026-07-27 16:58 UTCGHSA enrichment
  72. 2026-07-27 14:13 UTCEPSS rescore
  73. 2026-07-26 14:54 UTCEPSS rescore
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-26 14:22 UTCEG score recompute

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 0% probability of exploitation in the next 30 days, which ranks it in the top 69.2% of all scored CVEs.
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.

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