CVE-2026-41839

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory published 2026-06-09. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.2Exploit: NoneExposed: 0

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

A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.

Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

CVSS v3
4.2
EG Score
4.2(high)
EPSS
9.6%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Jun 19, 2026
No patch confirmed yet.
generic

CVE-2026-41839: Spring Framework Escalation via Session Fixation in WebFlux

https://spring.io/security/cve-2026-41839

Vendor Advisories for CVE-2026-41839(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 20× in last 7d / 82× 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 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 22:09 UTCEG score recompute
  6. 2026-07-05 22:09 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 19:58 UTCEG score recompute
  9. 2026-07-04 19:58 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 16:02 UTCEG score recompute
  12. 2026-07-03 16:01 UTCGHSA enrichment
  13. 2026-07-02 13:44 UTCEG score recompute
  14. 2026-07-02 13:44 UTCGHSA enrichment
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-07-01 11:33 UTCEG score recompute
  17. 2026-07-01 11:33 UTCGHSA enrichment
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 09:27 UTCEG score recompute
  20. 2026-06-30 09:27 UTCGHSA enrichment
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 07:21 UTCEG score recompute
  23. 2026-06-29 07:21 UTCGHSA enrichment
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 57 more
  1. 2026-06-28 03:28 UTCEG score recompute
  2. 2026-06-28 03:28 UTCGHSA enrichment
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-27 01:21 UTCEG score recompute
  5. 2026-06-27 01:21 UTCGHSA enrichment
  6. 2026-06-25 23:15 UTCEG score recompute
  7. 2026-06-25 23:15 UTCGHSA enrichment
  8. 2026-06-25 13:49 UTCEPSS rescore
  9. 2026-06-25 13:49 UTCEPSS rescore
  10. 2026-06-24 21:09 UTCEG score recompute
  11. 2026-06-24 21:08 UTCGHSA enrichment
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-23 21:33 UTCEPSS rescore
  14. 2026-06-23 15:48 UTCEG score recompute
  15. 2026-06-23 15:48 UTCGHSA enrichment
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 13:39 UTCEG score recompute
  19. 2026-06-22 13:39 UTCGHSA enrichment
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 05:06 UTCEG score recompute
  23. 2026-06-21 05:06 UTCGHSA enrichment
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-20 02:45 UTCEG score recompute
  26. 2026-06-20 02:45 UTCGHSA enrichment
  27. 2026-06-19 19:25 UTCEPSS rescore
  28. 2026-06-19 00:37 UTCEG score recompute
  29. 2026-06-19 00:37 UTCGHSA enrichment
  30. 2026-06-17 22:28 UTCEG score recompute
  31. 2026-06-17 22:28 UTCGHSA enrichment
  32. 2026-06-17 17:53 UTCEPSS rescore
  33. 2026-06-16 20:18 UTCEG score recompute
  34. 2026-06-16 20:18 UTCGHSA enrichment
  35. 2026-06-16 17:52 UTCEPSS rescore
  36. 2026-06-15 18:12 UTCEG score recompute
  37. 2026-06-15 18:12 UTCGHSA enrichment
  38. 2026-06-15 17:49 UTCEPSS rescore
  39. 2026-06-14 15:24 UTCEG score recompute
  40. 2026-06-14 15:24 UTCGHSA enrichment
  41. 2026-06-13 23:00 UTCEPSS rescore
  42. 2026-06-13 13:17 UTCEG score recompute
  43. 2026-06-13 13:17 UTCGHSA enrichment
  44. 2026-06-12 23:12 UTCEPSS rescore
  45. 2026-06-12 23:12 UTCEPSS rescore
  46. 2026-06-12 11:06 UTCEG score recompute
  47. 2026-06-12 11:06 UTCGHSA enrichment
  48. 2026-06-11 14:00 UTCEPSS rescore
  49. 2026-06-11 09:00 UTCEG score recompute
  50. 2026-06-11 09:00 UTCGHSA enrichment
  51. 2026-06-10 22:18 UTCEPSS rescore
  52. 2026-06-10 13:22 UTCEPSS rescore
  53. 2026-06-10 13:22 UTCEPSS rescore
  54. 2026-06-10 06:54 UTCEG score recompute
  55. 2026-06-10 06:53 UTCGHSA enrichment
  56. 2026-06-09 04:47 UTCEG score recompute
  57. 2026-06-09 04:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41839?
CVE-2026-41839 is a medium vulnerability published on June 9, 2026. A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0…
When was CVE-2026-41839 disclosed?
CVE-2026-41839 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41839 actively exploited?
CVE-2026-41839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41839?
CVE-2026-41839 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-41839?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41839, 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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