CVE-2026-57303

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.

CVSS v3
7.1
EG Score
7.1(high)
EPSS
12.9%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic

Jenkins Security Advisory 2026-06-24

https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3692%20(1)

Vendor Advisories for CVE-2026-57303(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 36× in last 7d / 63× 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. 2026-07-06 23:59 UTCEG score recompute
  2. 2026-07-06 23:59 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 11:21 UTCEG score recompute
  6. 2026-07-06 11:21 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 22:27 UTCEG score recompute
  10. 2026-07-05 22:27 UTCGHSA enrichment
  11. 2026-07-05 09:49 UTCEG score recompute
  12. 2026-07-05 09:49 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 21:10 UTCEG score recompute
  16. 2026-07-04 21:10 UTCGHSA enrichment
  17. 2026-07-04 08:31 UTCEG score recompute
  18. 2026-07-04 08:31 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 19:53 UTCEG score recompute
  22. 2026-07-03 19:53 UTCGHSA enrichment
  23. 2026-07-03 07:15 UTCEG score recompute
  24. 2026-07-03 07:15 UTCGHSA enrichment
  25. 2026-07-02 18:37 UTCEG score recompute
Show 38 more
  1. 2026-07-02 18:37 UTCGHSA enrichment
  2. 2026-07-02 05:59 UTCEG score recompute
  3. 2026-07-02 05:59 UTCGHSA enrichment
  4. 2026-07-01 17:20 UTCEG score recompute
  5. 2026-07-01 17:20 UTCGHSA enrichment
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-07-01 04:42 UTCEG score recompute
  8. 2026-07-01 04:42 UTCGHSA enrichment
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-30 16:04 UTCEG score recompute
  11. 2026-06-30 16:04 UTCGHSA enrichment
  12. 2026-06-30 03:24 UTCEG score recompute
  13. 2026-06-30 03:24 UTCGHSA enrichment
  14. 2026-06-29 14:47 UTCEG score recompute
  15. 2026-06-29 14:47 UTCGHSA enrichment
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 02:09 UTCEG score recompute
  18. 2026-06-29 02:09 UTCGHSA enrichment
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 13:31 UTCEG score recompute
  21. 2026-06-28 13:31 UTCGHSA enrichment
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 00:54 UTCEG score recompute
  24. 2026-06-28 00:54 UTCGHSA enrichment
  25. 2026-06-27 12:16 UTCEG score recompute
  26. 2026-06-27 12:16 UTCGHSA enrichment
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-26 23:38 UTCEG score recompute
  29. 2026-06-26 23:38 UTCGHSA enrichment
  30. 2026-06-26 11:01 UTCEG score recompute
  31. 2026-06-26 11:01 UTCGHSA enrichment
  32. 2026-06-25 17:20 UTCEG score recompute
  33. 2026-06-25 17:20 UTCGHSA enrichment
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 04:41 UTCEG score recompute
  36. 2026-06-25 04:41 UTCGHSA enrichment
  37. 2026-06-24 16:02 UTCEG score recompute
  38. 2026-06-24 16:02 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-57303?
CVE-2026-57303 is a high vulnerability published on June 24, 2026. Jenkins Assembla Plugin 1.4 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks, allowing attackers able to control the responses of the configured Assembla server to extract secrets from the Jenkins controller or perform server-side request forgery.
When was CVE-2026-57303 disclosed?
CVE-2026-57303 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57303 actively exploited?
CVE-2026-57303 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57303?
CVE-2026-57303 has a CVSS v3.1 base score of 7.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-57303?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57303, 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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