CVE-2026-78254Network attack vector

Arbitrary file overwrite via traversal download paths

Published Sep 7, 2026 · Updated Sep 8, 2026

Path traversal in Apache Ant before 1.10.18 allows attackers to overwrite files through malicious ftp or scp download paths. FTP.getFile and the scp receive handlers resolved server-supplied relative names without ensuring the resulting files remained under the destination directory. Exploitation requires a malicious or machine-in-the-middle server, with trusted server identity for scp or ftps, and writes with the Ant user's permissions.

CVSS severityUnavailable
Unscored
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Apache Ant before 1.10.18 allows attackers to overwrite files through malicious ftp or scp download paths. FTP.getFile and the scp receive handlers resolved server-supplied relative names without ensuring the resulting files remained under the destination directory. Exploitation requires a malicious or machine-in-the-middle server, with trusted server identity for scp or ftps, and writes with the Ant user's permissions.

The record

CVE
CVE-2026-78254
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
The Apache Software Foundation
Product
Apache Ant
Classifications
T1105
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2 <1.10.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Apache Software Foundation · Apache Antversion=1.2 <1.10.18

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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