CVE-2026-33001

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-12843 (ENISA EUVD) · GHSA-r6qv-frpc-q66c (GitHub Security Advisories)Source: ENISA EUVD

8.8EG
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: 2.3%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Jenkins 2.554 and earlier, LTS 2.541.2 and earlier does not safely handle symbolic links during the extraction of .tar and .tar.gz archives, allowing crafted archives to write files to arbitrary locations on the filesystem, restricted only by file system access permissions of the user running Jenkins. This can be exploited to deploy malicious scripts or plugins on the controller by attackers with Item/Configure permission, or able to control agent processes.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation2.1% × 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
2.3%
EPSS %ILE
83rd
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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
2.3% within 30 daysSource: FIRST EPSS. 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

March 18, 2026

Last Modified

September 9, 2026

Advisory Details (10)

Auto-updated Jun 30, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10214
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10213
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10211
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10209
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10206
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10205
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10204
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10201
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:10199
Web page

Jenkins Security Advisory 2026-03-18

https://www.jenkins.io/security/advisory/2026-03-18/#SECURITY-3657

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatocp-tools-4/jenkins-rhel9:17769442152026-04-23redhat
redhatocp-tools-4/jenkins-rhel8:17767640962026-04-23redhat
redhatocp-tools-4/jenkins-rhel8:17767623472026-04-23redhat
mavenorg.jenkins-ci.main:jenkins-core @ 2.555 (fixes <= 2.554)—ghsa

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 rangeFix by version rangeDependents
org.jenkins-ci.main:jenkins-core1.396 ... 2.99 (1012 versions)
  • every version up to 2.555: fixed in 2.555
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 34× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 187 rows on record for this CVE, as 96 entries (4 repeats merged).

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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 87 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:52 UTCEPSS rescoreEPSS 2.3% · 83rd percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 2.1% · 82nd percentile
  3. 2026-11-11 16:39 UTCEPSS rescoreEPSS 2.1% · 82nd percentile
  4. 2026-11-10 16:43 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  5. 2026-11-09 16:35 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  6. 2026-11-08 16:39 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  7. 2026-11-08 05:15 UTCEchelonGraph re-scored
  8. 2026-11-08 05:15 UTCVendor advisory
  9. 2026-11-08 05:15 UTCGHSA enrichmentGHSA-r6qv-frpc-q66c · GitHub severity HIGH · GitHub CVSS 8.8
  10. 2026-11-07 16:38 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  11. 2026-11-06 16:37 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  12. 2026-11-05 16:37 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  13. 2026-11-04 16:35 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  14. 2026-11-03 16:47 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  15. 2026-11-02 16:44 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  16. 2026-11-01 07:54 UTCGHSA enrichmentGHSA-r6qv-frpc-q66c · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-11-01 07:54 UTCEchelonGraph re-scored
  18. 2026-11-01 00:45 UTCEchelonGraph re-scored
  19. 2026-11-01 00:45 UTCVendor advisory
  20. 2026-10-31 16:32 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  21. 2026-10-30 16:34 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  22. 2026-10-29 16:33 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  23. 2026-10-28 16:32 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  24. 2026-10-27 16:31 UTCEPSS rescoreEPSS 2.1% · 81st percentile
  25. 2026-10-25 16:32 UTCEPSS rescoreEPSS 2.1% · 81st percentile
Show 71 more
  1. 2026-10-25 14:35 UTCEchelonGraph re-scored
  2. 2026-10-24 20:16 UTCEchelonGraph re-scored
  3. 2026-10-24 20:16 UTCVendor advisory
  4. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  5. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  6. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  7. 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  8. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  9. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  10. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  11. 2026-10-18 03:47 UTCEchelonGraph re-scored
  12. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  13. 2026-10-17 15:47 UTCEchelonGraph re-scored
  14. 2026-10-17 15:47 UTCVendor advisory
  15. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  16. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  17. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  18. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  19. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  20. 2026-10-12 16:13 UTCEchelonGraph re-scored
  21. 2026-10-11 19:56 UTCEchelonGraph re-scored
  22. 2026-10-11 17:09 UTCEchelonGraph re-scored
  23. 2026-10-11 14:36 UTCEchelonGraph re-scored
  24. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  26. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  27. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  28. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  29. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  30. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  31. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  32. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  33. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  34. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  35. 2026-09-29 07:15 UTCOSV refresh
  36. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  37. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  38. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  39. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  40. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  41. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  42. 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  43. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  44. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  45. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  46. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  47. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  48. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  49. 2026-09-09 13:42 UTCVendor advisory
  50. 2026-09-09 12:41 UTCEchelonGraph re-scored
  51. 2026-09-09 12:41 UTCVendor advisory
  52. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  53. 2026-09-07 14:01 UTCEchelonGraph re-scored
  54. 2026-09-07 14:01 UTCVendor advisory
  55. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  56. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  57. 2026-09-02 18:08 UTCOSV refresh
  58. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  59. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  60. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  63. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  64. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  65. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  66. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  67. 2026-08-24 14:17 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  68. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  69. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  70. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  71. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.2% · 64th percentile

Frequently asked(5)

What is CVE-2026-33001?
CVE-2026-33001 is a high-severity vulnerability; its CVE record was published on March 18, 2026. Jenkins 2.554 and earlier, LTS 2.541.2 and earlier does not safely handle symbolic links during the extraction of .tar and .tar.gz archives, allowing crafted archives to write files to arbitrary locations on the filesystem, restricted only by file system access permissions of the user running…
When was the CVE record for CVE-2026-33001 published?
The CVE record for CVE-2026-33001 was published on March 18, 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 September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-33001 actively exploited?
CVE-2026-33001 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (83rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33001?
CVE-2026-33001 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-33001?
A fix for CVE-2026-33001 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33001 are linked in the Vendor Advisories panel on this page.

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