CVE-2026-53437

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-06-10. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

A fix is available — apply it.

Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between //, allowing attackers to perform phishing attacks.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

June 10, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Jun 18, 2026
No patch confirmed yet.
generic

Jenkins Security Advisory 2026-06-10

https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755

Vendor Advisories for CVE-2026-53437(12)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatocp-tools-4/jenkins-rhel8:17866286672026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335652026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871251662026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246352026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871250692026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871249252026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871253112026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871247792026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286812026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335612026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246322026-08-26redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.jenkins-ci.main:jenkins-core2.556 ... 2.567 (12 versions)2.568—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 40× 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 201 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53437?
CVE-2026-53437 is a medium vulnerability published on June 10, 2026. Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between //, allowing attackers to perform phishing attacks.
When was CVE-2026-53437 disclosed?
CVE-2026-53437 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53437 actively exploited?
CVE-2026-53437 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 60.3% of all scored CVEs.
What is the CVSS score of CVE-2026-53437?
CVE-2026-53437 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-53437?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53437, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53437

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