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VulnerabilityPublished

CVE-2026-93996: Apache MINA SSHD · Unthrottled Resource Allocation

Affects Apache MINA SSHDSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 3.0.0-M6 or 2.20.0 when convenient.

Data as of 13 Nov 2026, 23:54 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-09-30.

Patch
Available – fixed in 3.0.0-M6, 2.20.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.

What to do

Upgrade Apache to 3.0.0-M6 or 2.20.0.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache MINA SSHDAffected
  • >=3.0.0-M1 <3.0.0-M6
Fixed in
  • 3.0.0-M6
Apache Software FoundationApache MINA SSHDAffected
  • <2.20.0
Fixed in
  • 2.20.0
MavenApache Software Foundation/org.apache.sshd:sshd-scppkg:maven/Apache Software Foundation/org.apache.sshd:sshd-scpOther threatsAffected
  • <2.20.0
  • >=3.0.0-M1 <3.0.0-M6
Fixed in
  • 2.20.0
  • 3.0.0-M6

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache MINA SSHD to version 2.20.0 or 3.0.0-M6 or later, where the vulnerability is fixed by enforcing an upper limit on SCP protocol line length. No other mitigation is indicated or required.

Description

CVE-2026-93996 is a vulnerability in Apache MINA SSHD's sshd-scp component that allows uncontrolled resource consumption. The SCP protocol handler did not limit the length of protocol lines, enabling a malicious peer to send a never-ending line without line feed characters. This causes the receiver to allocate excessive memory, potentially leading to an OutOfMemoryError and application crash. Versions up to 2.19.0 and from 3.0.0-M1 to 3.0.0-M5 are affected. Upgrading to versions 2.20.0 or 3.0.0-M6 mitigates the issue by enforcing an upper limit on SCP protocol line length.

References

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