CVE-2026-41635
MINA RCE via class allowlist bypass in AbstractIoBuffer.resolveClass()
Is CVE-2026-41635 being exploited?
Not confirmed. CVE-2026-41635 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.64% probability of exploitation in the next 30 days.
How severe is CVE-2026-41635?
CVE-2026-41635 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-41635?
Yes. A fix has been recorded for CVE-2026-41635. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41635 affect?
CVE-2026-41635 affects Apache MINA 2.0.0-2.0.27, Apache MINA 2.1.0-2.1.10, Apache MINA 2.2.0-2.2.5, Applications using IoBuffer.getObject(). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41635?
Upgrade to fixed MINA versions (2.0.28+, 2.1.11+, 2.2.6+)
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via deserialization in IoBuffer.getObject() due to missing/unsafe class filter check
Patch when possible
- affected>= 2.2.0 and <= 2.2.5
- affected>= 2.1.0 and <= 2.1.10
- affected>= 2.0.0 and <= 2.0.27
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.