CVE-2026-41635

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed.

The fix checks if the class is present in the accepted class filter before calling Class.forName(). 

Affected versions are Apache MINA 2.0.0 <= 2.0.27, 2.1.0 <= 2.1.10, and

2.2.0 <= 2.2.5.

The problem is resolved in Apache MINA 2.0.28, 2.1.11, and 2.2.6 by applying the classname allowlist earlier.

Affected are applications using Apache MINA that call  IoBuffer.getObject().

Applications using Apache MINA are advised to upgrade.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
46.4%
KEV
Not listed

Published

April 27, 2026

Last Modified

April 29, 2026

Advisory Details (2)

Auto-updated May 10, 2026
No patch confirmed yet.
generic

oss-security - ZDRES-059: CVE-2026-41635: Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE

http://www.openwall.com/lists/oss-security/2026/04/27/4
generic
https://lists.apache.org/thread/1l91w1mqsb3lwfd504fs045ylxntt2tm

Vendor Advisories for CVE-2026-41635(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatmina-core2026-05-14redhat

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 rangeFixed inDependents
org.apache.mina:mina-core2.2.0 ... 2.2.5 (6 versions)2.2.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 48× 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 206 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-41635?
CVE-2026-41635 is a critical vulnerability published on April 27, 2026. Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed. The fix checks if the class is present in the accepted class filter…
When was CVE-2026-41635 disclosed?
CVE-2026-41635 was first published in the National Vulnerability Database on April 27, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41635 actively exploited?
CVE-2026-41635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41635?
CVE-2026-41635 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-41635?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41635, 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.

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