CVE-2026-70426

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Remoting 3384.v60d89463d9e0 and earlier, except 3355.3357.v931d3c992987, included in Jenkins 2.575 and earlier, LTS 2.568.1 and earlier, the JEP-200 class filter is not applied to classes resolved via a fallback path in the Remoting deserialization implementation, allowing agent processes, code running on agents, and attackers with Agent/Connect permission to bypass the JEP-200 deserialization filter for classes on the Jenkins core classpath.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
41
EG Risk 41/100CISA SSVC

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
Severity90% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
Patch available.
generic

Jenkins Security Advisory 2026-08-05

https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3911

Vendor Advisories for CVE-2026-70426(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 / EcosystemFix (by version range) / PatchReleasedSource
redhatocp-tools-4/jenkins-rhel8:17865335652026-08-26redhat
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-rhel8:17866286672026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246352026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871251662026-08-26redhat
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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 36× in last 7d / 251× 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 519 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-70426?
CVE-2026-70426 is a critical vulnerability published on August 5, 2026. In Remoting 3384.v60d89463d9e0 and earlier, except 3355.3357.v931d3c992987, included in Jenkins 2.575 and earlier, LTS 2.568.1 and earlier, the JEP-200 class filter is not applied to classes resolved via a fallback path in the Remoting deserialization implementation, allowing agent processes, code…
When was CVE-2026-70426 disclosed?
CVE-2026-70426 was first published on August 5, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70426 actively exploited?
CVE-2026-70426 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70426?
CVE-2026-70426 has a CVSS v3.1 base score of 9.0 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-70426?
A fix for CVE-2026-70426 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70426 are linked in the Vendor Advisories panel on this page.

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