CVE-2026-41635

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 52% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 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)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

April 27, 2026

Last Modified

April 29, 2026

Advisory Details (2)

Auto-updated Aug 26, 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

(7 across 5 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
mina1.1.7.dfsg-13, 1.1.7.dfsg-14——
mina22.1.4-2 ... 2.2.1-4 (7 versions)——
Debian:12(2)
PackageVulnerable rangeFixed inDependents
mina1.1.7.dfsg-13, 1.1.7.dfsg-14——
mina22.2.1-3, 2.2.1-4——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
mina22.2.1-4——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
mina22.2.1-4——
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 5× in last 7d / 86× 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 243 total refreshes for this CVE.

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

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 1% probability of exploitation in the next 30 days, which ranks it in the top 52.1% of all scored CVEs.
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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-41635

Explore →

Is Your Infrastructure Affected by CVE-2026-41635?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs