CVE-2026-77113

Received Received - Intake

Path Traversal in Canonical Apport via Crash Report Files

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: Canonical Ltd.

Description

Path traversal in apport-unpack in Canonical Apport before 2.36.0, 2.34.2, and 2.28.4 on Linux allows an attacker to create or overwrite arbitrary files with the privileges of the executing user via an attacker controlled key names in crash report files.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-20

Last Modified

2026-08-20

Generated

2026-08-21

AI Q&A

2026-08-21

EPSS Evaluated

N/A

NVD

CVE-2026-77113

EUVD

EUVD-2026-63758

Affected Vendors & Products

Vendor	Product	Version / Range
canonical	apport	to 2.36.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-23	The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.

Attack-Flow Graph

Executive Summary

This vulnerability is a path traversal issue in the apport-unpack component of Canonical Apport before versions 2.36.0, 2.34.2, and 2.28.4. It allows an attacker to create or overwrite arbitrary files with the privileges of the user running the application by manipulating key names in crash report files.

Detection Guidance

This vulnerability can be detected by checking the version of Apport installed on your system. Run 'apt list --installed | grep apport' to see the installed version. If it is below 2.36.0, 2.34.2, or 2.28.4, the system is vulnerable. Additionally, monitor for unexpected file creation or modification in user-writable directories.

Impact Analysis

An attacker could exploit this to overwrite critical system files, install malware, or gain elevated privileges. Users running vulnerable versions of Apport are at risk if they process untrusted crash reports.

Compliance Impact

The vulnerability allows attackers to create or overwrite arbitrary files with user privileges via path traversal in crash reports. This could potentially lead to unauthorized data access or modification, which may violate compliance requirements for data integrity and confidentiality under standards like GDPR and HIPAA.

Mitigation Strategies

Update Apport to version 2.36.0, 2.34.2, or 2.28.4 or later to address the path traversal vulnerability in apport-unpack.

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