9.8

CVE-2026-42779: apache software foundation apache mina Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-42779CGA-3g7h-fxf6-ccqhCGA-4x9w-qrcv-mch2
Published 01-05-2026Last modified 02-05-2026
Open JSON

Vulnerability summary

CVE-2026-42779 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in apache software foundation apache mina. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.76%
0%100%
Low · -0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-8465-1CGA-Q5JW-VWMH-F432

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 02-05-2026
    Last modifiedVulnerability information updated.

Description

The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: 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 2.1.0 <= 2.1.11, and 2.2.0 <= 2.2.6. The problem is resolved in Apache MINA 2.1.12, and 2.2.7 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 metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.76%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

-0.14 pp

From 0.90% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.76%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard15 products
  • apache-hop< 2.17.0-r10
  • apache-hop-fips< 2.17.0-r10
  • apache-nifi< 2.9.0-r5
  • guacamole-client-extensions< 1.6.0-r13
  • jenkins-2-openjdk-21< 2.564-r1
Wolfi3 products
  • apache-nifi< 2.9.0-r5
  • jenkins-2-openjdk-21< 2.564-r1
  • jenkins-2-openjdk-25< 2.564-r1
Apache1 product
  • mina≥ 2.1.0, < 2.1.12 | ≥ 2.2.0, < 2.2.7
Apache software foundation1 product
  • apache mina≥ 2.2.X, ≤ 2.2.6 | ≥ 2.1.X, ≤ 2.1.11
Org.apache.mina1 product
  • mina-core≥ 2.1.0, < 2.1.12 | ≥ 2.2.0, < 2.2.7
Ubuntu1 product
  • mina2All versions (No fix recorded)

6 vendors · 22 products

References

8 links