CVE-2026-70426

CRITICALPre-NVD 9.09.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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 (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week

Also known asEUVD-2026-53569 (ENISA EUVD) · GHSA-v269-8r2r-vj93 (GitHub Security Advisories)Source: ENISA EUVD

9.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • 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 41/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity90% × 45%
Impact severity (EG Severity): CVSS 9.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is its impact severity (EG Severity), not escalated.

EG Severity
9.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
Patch available.
Web page

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-rhel9:17871246322026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17865335612026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871247792026-08-26redhat
redhatocp-tools-4/jenkins-rhel8:17866286812026-08-26redhat
redhatocp-tools-4/jenkins-rhel9:17871246352026-08-26redhat
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-rhel9:17871251662026-08-26redhat

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 28× in last 7d / 116× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 624 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 524 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-11-02 09:57 UTCEG score recompute
  3. 2026-11-02 09:57 UTCVendor advisory
  4. 2026-11-02 09:57 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  5. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-11-01 09:16 UTCEG score recompute
  7. 2026-11-01 09:16 UTCVendor advisory
  8. 2026-11-01 09:16 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  9. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-31 08:36 UTCEG score recompute
  11. 2026-10-31 08:36 UTCVendor advisory
  12. 2026-10-31 08:35 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  13. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-30 07:55 UTCEG score recompute
  15. 2026-10-30 07:55 UTCVendor advisory
  16. 2026-10-30 07:55 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  17. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-29 07:14 UTCEG score recompute
  19. 2026-10-29 07:14 UTCVendor advisory
  20. 2026-10-29 07:14 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  21. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-28 06:34 UTCEG score recompute
  23. 2026-10-28 06:34 UTCVendor advisory
  24. 2026-10-28 06:34 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  25. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
Show 75 more
  1. 2026-10-27 05:53 UTCEG score recompute
  2. 2026-10-27 05:53 UTCVendor advisory
  3. 2026-10-27 05:53 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  4. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-26 01:08 UTCEG score recompute
  6. 2026-10-26 01:08 UTCVendor advisory
  7. 2026-10-26 01:08 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  8. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-10-25 14:08 UTCEG score recompute
  10. 2026-10-25 00:27 UTCEG score recompute
  11. 2026-10-25 00:27 UTCVendor advisory
  12. 2026-10-25 00:27 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-23 23:47 UTCEG score recompute
  15. 2026-10-23 23:47 UTCVendor advisory
  16. 2026-10-23 23:47 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-22 23:06 UTCEG score recompute
  19. 2026-10-22 23:06 UTCVendor advisory
  20. 2026-10-22 23:06 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  21. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-21 22:25 UTCEG score recompute
  23. 2026-10-21 22:25 UTCVendor advisory
  24. 2026-10-21 22:24 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  25. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  26. 2026-10-20 21:42 UTCEG score recompute
  27. 2026-10-20 21:42 UTCVendor advisory
  28. 2026-10-20 21:42 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  29. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  30. 2026-10-19 21:02 UTCEG score recompute
  31. 2026-10-19 21:02 UTCVendor advisory
  32. 2026-10-19 21:01 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  33. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  34. 2026-10-18 19:46 UTCEG score recompute
  35. 2026-10-18 19:46 UTCVendor advisory
  36. 2026-10-18 19:46 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  37. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-10-18 03:18 UTCEG score recompute
  39. 2026-10-17 19:04 UTCEG score recompute
  40. 2026-10-17 19:04 UTCVendor advisory
  41. 2026-10-17 19:04 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  42. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  43. 2026-10-16 18:23 UTCEG score recompute
  44. 2026-10-16 18:23 UTCVendor advisory
  45. 2026-10-16 18:22 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  46. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  47. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  48. 2026-10-15 14:47 UTCEG score recompute
  49. 2026-10-15 14:47 UTCVendor advisory
  50. 2026-10-15 14:46 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  51. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  52. 2026-10-14 09:19 UTCEG score recompute
  53. 2026-10-14 09:19 UTCVendor advisory
  54. 2026-10-14 09:19 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  55. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  56. 2026-10-13 06:38 UTCEG score recompute
  57. 2026-10-13 06:38 UTCVendor advisory
  58. 2026-10-13 06:38 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  59. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  60. 2026-10-12 15:43 UTCEG score recompute
  61. 2026-10-12 05:57 UTCVendor advisory
  62. 2026-10-12 05:57 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  63. 2026-10-11 19:29 UTCEG score recompute
  64. 2026-10-11 16:44 UTCEG score recompute
  65. 2026-10-11 14:05 UTCEG score recompute
  66. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  67. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  68. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  69. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  70. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  71. 2026-10-07 03:56 UTCVendor advisory
  72. 2026-10-07 03:56 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0
  73. 2026-10-06 23:37 UTCEG score recompute
  74. 2026-10-06 23:37 UTCVendor advisory
  75. 2026-10-06 23:37 UTCGHSA enrichmentGHSA-v269-8r2r-vj93 · GitHub severity CRITICAL · GitHub CVSS 9.0

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Frequently asked(5)

What is CVE-2026-70426?
CVE-2026-70426 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-70426 published?
The CVE record for CVE-2026-70426 was published on August 5, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
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 (43rd 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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