- 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.
- Source
- security@apache.org
- NVD status
- Analyzed
- Products
- mina
CVSS 3.1
- Type
- Secondary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
- security@apache.org
- CWE-502
- Hype score
- Not currently trending
6 new OPEN, 7 new PRO (6 + 1) CVE-2026-17633 (IBM Langflow RCE), CVE-2026-87902 (Wordpress Core Template Path Traversal), CVE-2026-42779 (Apache MINA Allowlist Bypass RCE), TA569, and more. https://t.co/rV4vsQj0Kf
@ET_Labs
25 Sept 2026
233 Impressions
2 Retweets
0 Likes
1 Bookmark
0 Replies
0 Quotes
The Patch That Wasn''t: Apache MINA CVE-2026-42779 Deserialization Bypass Proves the Incomplete-Fix Pattern Still Kills. The Patch That Wasn't: Apache MINA CVE-2026-42779 Deserialization Bypass Proves the Incomplete-Fix Pattern Still Kills
@lyrie_ai
13 Jun 2026
16 Impressions
0 Retweets
0 Likes
0 Bookmarks
1 Reply
0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:apache:mina:*:*:*:*:*:*:*:*",
"matchCriteriaId": "BD7E18F5-1CE6-4CD7-8A0D-BD0C2574FF12",
"versionEndExcluding": "2.1.12",
"versionStartIncluding": "2.1.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:apache:mina:*:*:*:*:*:*:*:*",
"matchCriteriaId": "758E989E-5CB0-471C-AADB-43EB3FB95407",
"versionEndExcluding": "2.2.7",
"versionStartIncluding": "2.2.0",
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}
],
"negate": false,
"operator": "OR"
}
]
}
]