CVE-2026-77113: CWE-23 Relative path traversal in Canonical Apport
Description
CVE-2026-77113 is a medium severity vulnerability in Canonical Apport affecting versions prior to 2.36.0, 2.34.2, and 2.28.4. It involves a relative path traversal flaw in the apport-unpack component on Linux systems. This flaw allows an attacker to create or overwrite arbitrary files with the privileges of the executing user by manipulating key names in crash report files.
CVSS v4.0
Score 6.7medium
Affected software
Canonical
Apport
pkg:github/apport-unpackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-77113 exists in Canonical Apport's apport-unpack utility before versions 2.36.0, 2.34.2, and 2.28.4. It is a relative path traversal issue (CWE-23) that permits an attacker to specify crafted key names in crash report files, enabling the creation or overwriting of arbitrary files on the filesystem with the permissions of the user running apport-unpack. This can lead to unauthorized file modification or potential privilege escalation depending on the context of execution.
Potential Impact
An attacker who can supply crafted crash report files can exploit this vulnerability to write or overwrite files arbitrarily with the privileges of the user executing apport-unpack. This could lead to unauthorized file modification, potentially affecting system stability or security depending on the files targeted. The CVSS 4.0 score is 6.7 (medium severity), reflecting local attack vector, low complexity, no privileges required, user interaction needed, and high impact on integrity.
Mitigation Recommendations
A fix is available in Canonical Apport versions 2.36.0, 2.34.2, and 2.28.4. Users should upgrade to these or later versions to remediate this vulnerability. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-08-20T11:53:23.292Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a878543acd9273b493c76eb
Added to database: 08/20/2026, 22:52:51 UTC
Last enriched: 09/11/2026, 03:33:49 UTC
Last updated: 10/05/2026, 06:48:18 UTC
Views: 79
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