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Vulnerability details: VCID-kvs1-xhhs-27fc
Vulnerability ID VCID-kvs1-xhhs-27fc
Aliases CVE-2026-42778
GHSA-995c-6rp3-4m4x
Summary The fix for CVE-2026-41409 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed. 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 The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed. Affected versions are Apache MINA 2.1.0 <= 2.1.110, 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
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-502 Deserialization of Untrusted Data
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42778.json
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2026-42778
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2026-42778
cvssv3.1 9.8 https://github.com/advisories/GHSA-76h9-2vwh-w278
generic_textual CRITICAL https://github.com/advisories/GHSA-76h9-2vwh-w278
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-995c-6rp3-4m4x
cvssv3.1 9.8 https://github.com/advisories/GHSA-f2wh-grmh-r6jm
generic_textual CRITICAL https://github.com/advisories/GHSA-f2wh-grmh-r6jm
cvssv3.1 9.8 https://github.com/apache/mina
generic_textual CRITICAL https://github.com/apache/mina
cvssv3.1 9.8 https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
generic_textual CRITICAL https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
ssvc Track https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2026-42778
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2026-42778
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42778.json
https://api.first.org/data/v1/epss?cve=CVE-2026-42778
https://github.com/advisories/GHSA-76h9-2vwh-w278
https://github.com/advisories/GHSA-f2wh-grmh-r6jm
https://github.com/apache/mina
https://nvd.nist.gov/vuln/detail/CVE-2026-42778
2464321 https://bugzilla.redhat.com/show_bug.cgi?id=2464321
fhlx5k91hrkgyzh7yk1nghrn3k27gxy0 https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
GHSA-995c-6rp3-4m4x https://github.com/advisories/GHSA-995c-6rp3-4m4x
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42778.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/advisories/GHSA-76h9-2vwh-w278
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/advisories/GHSA-f2wh-grmh-r6jm
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/apache/mina
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-05-01T13:21:04Z/ Found at https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42778
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.52555
EPSS Score 0.00287
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:44:11.890992+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/42xxx/CVE-2026-42778.json 38.6.0