CVE-2026-78254 Vulnerability Analysis & Exploit Details

CVE-2026-78254
Vulnerability Scoring

7.4
/10
Very High Risk

Highly exploitable, CVE-2026-78254 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-78254 Details

Status: Analyzed

Last updated: 🕐 09 Sep 2026, 13:29 UTC
Originally published on: 🕗 07 Sep 2026, 08:17 UTC

Time between publication and last update: 2 days

CVSS Release: version 3

CVSS3 Source

134c704f-9b21-4f2e-91b3-4a467353bcc0

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVE-2026-78254 Vulnerability Summary

CVE-2026-78254: The ftp and scp tasks of Apache Ant can download files from a remote server. A malicious server can provide relative paths that allow it to write outside of the dedicated target directory for the download, making it possible to overwrite files of the attacker's choice using the permissions of the user running Ant in versions prior to Ant 1.10.18. In order to exploit this vulnerability, the server would either have to be malicious or be subject to a machine-in-the-middle attack. Additionally in the case of scp or the ftp task using ftps the server must pass the server identity checks performed by the tasks. For ftp tasks not using ftps a malicious server could act as a machine-in-the-middle to provide malicious files. Starting with Ant 1.10.18 both tasks will prevent writing outside of the destination directory by default. An option is available to disable this behavior in the unlikely case that the old behavior is required by existing build files. Mitigations: Users of scp and ftp (when using ftps) in any version of Ant should not bypass server identity checks. Users of ftp not using ftps should switch to ftps where possible. All users are recommended to upgrade to Apache Ant 1.10.18, which fixes this issue.

Assessing the Risk of CVE-2026-78254

Access Complexity Graph

The exploitability of CVE-2026-78254 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-78254

CVE-2026-78254 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-78254, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-78254, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-78254 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2026-78254 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2026-78254 does not impact system availability.

CVE-2026-78254 References

External References

CWE Common Weakness Enumeration

CWE-23

CAPEC Common Attack Pattern Enumeration and Classification

  • Relative Path Traversal CAPEC-139 An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
  • Manipulating Web Input to File System Calls CAPEC-76 An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

Vulnerable Configurations

  • cpe:2.3:a:apache:ant:1.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.2:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.3:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.4:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.5:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.2:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.6.5:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.6.5:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.8.3:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.8.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.8.4:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.8.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.3:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.4:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.5:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.5:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.6:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.6:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.7:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.7:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.8:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.8:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.9:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.9:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.10:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.10:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.10:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.10:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.11:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.11:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.11:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.11:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.12:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.12:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.12:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.12:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.13:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.13:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.13:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.13:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.14:*:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.14:*:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.15:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.15:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.15:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.15:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.16:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.16:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.9.16:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.9.16:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.0:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.1:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.1:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.2:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.2:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.3:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.3:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.3:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.3:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.3:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.3:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.4:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.4:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.4:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.4:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.5:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.5:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.5:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.5:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.6:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.6:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.6:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.6:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.6:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.6:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.7:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.7:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.7:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.7:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.8:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.8:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.8:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.8:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.9:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.9:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.9:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.9:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.10:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.10:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.10:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.10:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.11:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.11:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.11:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.11:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.12:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.12:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.12:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.12:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.12:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.12:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.13:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.13:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.13:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.13:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.14:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.14:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.14:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.14:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.15:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.15:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.15:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.15:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.15:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.15:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.16:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.16:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.16:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.16:rc1:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.16:rc2:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.16:rc2:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.17:-:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.17:-:*:*:*:*:*:*
  • cpe:2.3:a:apache:ant:1.10.17:rc1:*:*:*:*:*:*
    cpe:2.3:a:apache:ant:1.10.17:rc1:*:*:*:*:*:*

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