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PatchSiren cyber security CVE debrief

CVE-2026-56452 Apache Software Foundation CVE debrief

A path traversal vulnerability exists in the sshd-scp component of Apache MINA SSHD, a Java library for client-side and server-side SSH. The implementation of receiving files or directories via SCP did not validate filenames in SCP 'C' or 'D' commands, allowing a malicious sender to send filenames containing paths and write files to attacker-controlled locations.

Vendor
Apache Software Foundation
Product
Apache MINA SSHD
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-20
Original CVE updated
2026-07-27
Advisory published
2026-07-20
Advisory updated
2026-07-27

Who should care

Developers and administrators of applications using Apache MINA SSHD versions < 2.0.0 and >= 2.0.0 with sshd-scp for receiving files should be aware of this vulnerability. Applications using Apache MINA SSHD >= 2.0.0 without sshd-scp are not affected.

Technical summary

The vulnerability arises from the lack of filename validation in SCP 'C' and 'D' commands within the sshd-scp component of Apache MINA SSHD. This oversight allows an attacker to manipulate filenames, potentially leading to file writes in unauthorized locations. The issue is particularly concerning for applications that use Apache MINA SSHD versions prior to 2.0.0 or versions >= 2.0.0 with the sshd-scp component for file reception.

Defensive priority

High priority should be given to upgrading to Apache MINA SSHD versions 2.19.0 or 3.0.0-M5, as the issue is fixed in these versions. Additionally, reviewing and restricting SCP commands, validating filenames, and implementing compensating controls can help mitigate the risk.

Recommended defensive actions

  • Upgrade to Apache MINA SSHD version 2.19.0 or 3.0.0-M5
  • Review and restrict SCP commands to only allow authorized file transfers
  • Validate filenames in SCP 'C' and 'D' commands
  • Implement compensating controls such as monitoring and logging
  • Conduct thorough inventory checks to identify affected applications

Evidence notes

The CVE record was published on 2026-07-20T21:16:48.820Z and was last modified on 2026-07-27T13:49:31.850Z. The NVD entry is currently Analyzed. Vendor advisory and mailing list references are provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56452 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56452

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56452 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56452

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.