CVE-2026-70427

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-08-05. 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of .tar and .tar.gz archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary locations on the file system, restricted only by file system access permissions of the user running Jenkins.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 5, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

Jenkins Security Advisory 2026-08-05

https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3930

Vendor Advisories for CVE-2026-70427(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 21× 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.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 14:20 UTCEG score recompute
  3. 2026-08-20 14:20 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 11:57 UTCEG score recompute
  6. 2026-08-19 11:56 UTCGHSA enrichment
  7. 2026-08-18 13:49 UTCEPSS rescore
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 10:41 UTCEG score recompute
  10. 2026-08-18 10:41 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-17 09:25 UTCEG score recompute
  13. 2026-08-17 09:25 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 08:09 UTCEG score recompute
  17. 2026-08-16 08:09 UTCGHSA enrichment
  18. 2026-08-16 02:15 UTCEPSS rescore
  19. 2026-08-15 06:54 UTCEG score recompute
  20. 2026-08-15 06:54 UTCGHSA enrichment
  21. 2026-08-15 01:31 UTCEPSS rescore
  22. 2026-08-14 05:34 UTCEG score recompute
  23. 2026-08-14 05:34 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 04:18 UTCEG score recompute
Show 24 more
  1. 2026-08-13 04:18 UTCGHSA enrichment
  2. 2026-08-12 13:51 UTCEPSS rescore
  3. 2026-08-12 03:03 UTCEG score recompute
  4. 2026-08-12 03:03 UTCGHSA enrichment
  5. 2026-08-11 01:48 UTCEG score recompute
  6. 2026-08-11 01:48 UTCGHSA enrichment
  7. 2026-08-11 00:00 UTCEPSS rescore
  8. 2026-08-10 00:32 UTCEG score recompute
  9. 2026-08-10 00:32 UTCGHSA enrichment
  10. 2026-08-09 13:47 UTCEPSS rescore
  11. 2026-08-08 23:17 UTCEG score recompute
  12. 2026-08-08 23:17 UTCGHSA enrichment
  13. 2026-08-08 16:37 UTCEPSS rescore
  14. 2026-08-07 22:01 UTCEG score recompute
  15. 2026-08-07 22:01 UTCGHSA enrichment
  16. 2026-08-06 20:46 UTCEG score recompute
  17. 2026-08-06 20:46 UTCGHSA enrichment
  18. 2026-08-06 13:47 UTCEPSS rescore
  19. 2026-08-05 19:30 UTCEG score recompute▲ 4.30
  20. 2026-08-05 19:30 UTCGHSA enrichment
  21. 2026-08-05 19:30 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  22. 2026-08-05 18:29 UTCNVD update
  23. 2026-08-05 17:56 UTCEG score recompute
  24. 2026-08-05 17:55 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70427?
CVE-2026-70427 is a medium vulnerability published on August 5, 2026. Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of .tar and .tar.gz archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary…
When was CVE-2026-70427 disclosed?
CVE-2026-70427 was first published in the National Vulnerability Database on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70427 actively exploited?
CVE-2026-70427 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 83.5% of all scored CVEs.
What is the CVSS score of CVE-2026-70427?
CVE-2026-70427 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-70427?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70427, 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

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