SB2026090711 - Path traversal in Apache Ant

Description

This security bulletin contains information about 1 vulnerability.

1) Path traversal (CVE-ID: CVE-2026-78254)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to overwrite arbitrary files.

The vulnerability exists due to path traversal in the ftp and scp tasks when processing files downloaded from a malicious server. A remote attacker can provide relative paths to write files outside the dedicated download target directory.

For scp and FTPS, the server must pass the tasks\' server identity checks; non-FTPS FTP connections may be subject to a machine-in-the-middle attack.

Remediation

Install update from vendor's website.

References

• https://lists.apache.org/api/email.lua?id=l1kmyhdknk0lzscxfozxncmcv8nptstk
• https://ant.apache.org/