CVE-2026-41855

CRITICALNVD 9.88.1▼
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. NVD baseline CVSS 9.8; sources differ by 1.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization.

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
9.8
EG Score
8.1(medium)
EPSS
18.4%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 29, 2026

Advisory Details (1)

Auto-updated Jun 29, 2026
No patch confirmed yet.
generic

CVE-2026-41855: Spring Framework Unsafe Deserialization via Jackson JMS Converters

https://spring.io/security/cve-2026-41855

Vendor Advisories for CVE-2026-41855(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 30× in last 7d / 143× 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.

Showing the most recent 100 of 143 total refreshes for this CVE.

  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 15:54 UTCEG score recompute
  6. 2026-07-05 15:54 UTCGHSA enrichment
  7. 2026-07-05 02:54 UTCEG score recompute
  8. 2026-07-05 02:54 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 14:29 UTCEG score recompute
  11. 2026-07-04 14:29 UTCGHSA enrichment
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-03 20:20 UTCEG score recompute
  14. 2026-07-03 20:20 UTCGHSA enrichment
  15. 2026-07-03 09:08 UTCEG score recompute
  16. 2026-07-03 09:07 UTCGHSA enrichment
  17. 2026-07-02 16:32 UTCEG score recompute
  18. 2026-07-02 16:32 UTCGHSA enrichment
  19. 2026-07-02 05:15 UTCEG score recompute
  20. 2026-07-02 05:15 UTCGHSA enrichment
  21. 2026-07-01 18:03 UTCEG score recompute
  22. 2026-07-01 18:03 UTCGHSA enrichment
  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-07-01 06:23 UTCEG score recompute
  25. 2026-07-01 06:22 UTCGHSA enrichment
Show 75 more
  1. 2026-06-30 23:22 UTCEPSS rescore
  2. 2026-06-30 18:33 UTCEG score recompute
  3. 2026-06-30 18:33 UTCGHSA enrichment
  4. 2026-06-30 07:20 UTCEG score recompute
  5. 2026-06-30 07:20 UTCGHSA enrichment
  6. 2026-06-29 19:24 UTCEG score recompute
  7. 2026-06-29 19:24 UTCGHSA enrichment
  8. 2026-06-29 15:26 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-29 08:12 UTCEG score recompute
  11. 2026-06-29 08:12 UTCGHSA enrichment
  12. 2026-06-28 20:40 UTCEG score recompute
  13. 2026-06-28 20:40 UTCGHSA enrichment
  14. 2026-06-28 14:07 UTCEPSS rescore
  15. 2026-06-28 09:28 UTCEG score recompute
  16. 2026-06-28 09:28 UTCGHSA enrichment
  17. 2026-06-28 04:56 UTCEPSS rescore
  18. 2026-06-27 22:17 UTCEG score recompute
  19. 2026-06-27 22:17 UTCGHSA enrichment
  20. 2026-06-27 11:05 UTCEG score recompute
  21. 2026-06-27 11:05 UTCGHSA enrichment
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-26 23:53 UTCEG score recompute
  24. 2026-06-26 23:53 UTCGHSA enrichment
  25. 2026-06-26 12:41 UTCEG score recompute
  26. 2026-06-26 12:41 UTCGHSA enrichment
  27. 2026-06-25 23:43 UTCEG score recompute
  28. 2026-06-25 23:43 UTCGHSA enrichment
  29. 2026-06-25 13:49 UTCEPSS rescore
  30. 2026-06-25 13:49 UTCEPSS rescore
  31. 2026-06-25 12:31 UTCEG score recompute
  32. 2026-06-25 12:31 UTCGHSA enrichment
  33. 2026-06-25 01:19 UTCEG score recompute
  34. 2026-06-25 01:19 UTCGHSA enrichment
  35. 2026-06-24 14:07 UTCEG score recompute
  36. 2026-06-24 14:07 UTCGHSA enrichment
  37. 2026-06-24 14:05 UTCEPSS rescore
  38. 2026-06-24 02:44 UTCEG score recompute
  39. 2026-06-24 02:44 UTCGHSA enrichment
  40. 2026-06-23 21:33 UTCEPSS rescore
  41. 2026-06-23 15:30 UTCEG score recompute
  42. 2026-06-23 15:30 UTCGHSA enrichment
  43. 2026-06-22 22:32 UTCEG score recompute
  44. 2026-06-22 22:32 UTCGHSA enrichment
  45. 2026-06-22 14:25 UTCEPSS rescore
  46. 2026-06-22 14:25 UTCEPSS rescore
  47. 2026-06-22 05:26 UTCEG score recompute
  48. 2026-06-22 05:26 UTCGHSA enrichment
  49. 2026-06-21 14:56 UTCEPSS rescore
  50. 2026-06-21 14:56 UTCEPSS rescore
  51. 2026-06-21 10:44 UTCEG score recompute
  52. 2026-06-21 10:44 UTCGHSA enrichment
  53. 2026-06-21 01:59 UTCEPSS rescore
  54. 2026-06-20 21:45 UTCEG score recompute
  55. 2026-06-20 21:45 UTCGHSA enrichment
  56. 2026-06-20 10:18 UTCEG score recompute
  57. 2026-06-20 10:18 UTCGHSA enrichment
  58. 2026-06-19 23:05 UTCEG score recompute
  59. 2026-06-19 23:04 UTCGHSA enrichment
  60. 2026-06-19 19:25 UTCEPSS rescore
  61. 2026-06-19 11:23 UTCEG score recompute
  62. 2026-06-19 11:23 UTCGHSA enrichment
  63. 2026-06-19 00:09 UTCEG score recompute
  64. 2026-06-19 00:09 UTCGHSA enrichment
  65. 2026-06-18 17:52 UTCEPSS rescore
  66. 2026-06-18 17:52 UTCEPSS rescore
  67. 2026-06-18 12:55 UTCEG score recompute
  68. 2026-06-18 12:54 UTCGHSA enrichment
  69. 2026-06-18 01:37 UTCEG score recompute
  70. 2026-06-18 01:37 UTCGHSA enrichment
  71. 2026-06-17 17:53 UTCEPSS rescore
  72. 2026-06-17 14:25 UTCEG score recompute
  73. 2026-06-17 14:25 UTCGHSA enrichment
  74. 2026-06-17 03:13 UTCEG score recompute
  75. 2026-06-17 03:13 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-41855?
CVE-2026-41855 is a critical vulnerability published on June 9, 2026. In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization. Affected…
When was CVE-2026-41855 disclosed?
CVE-2026-41855 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41855 actively exploited?
CVE-2026-41855 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41855?
CVE-2026-41855 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.
How do I remediate CVE-2026-41855?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41855, 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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