CVE-2026-86692 (GCVE-0-2026-86692)

Vulnerability from cvelistv5 – Published: 2026-11-09 20:14 – Updated: 2026-11-12 16:52
VLAI
Title
apport: Arbitrary file creation or overwrite via path traversal in base64-encoded problem report keys
Summary
In apport before 2.37.0, a path traversal vulnerability allows an attacker who can supply a crafted crash report to cause unintended file creation or overwrite outside the intended extraction directory when the report is processed with apport-unpack. The key-name validation added for CVE-2026-77113 does not cover base64-encoded keys skipped by ProblemReport.load(binary=False), and ProblemReport.extract_keys() writes them to a file path built from the key without validation. This allows an attacker to create or overwrite arbitrary files writable by the invoking user, such as .bashrc or .profile, gaining persistence or code execution in that user's context.
Severity
5.7 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-12 16:51 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
canonical CNA under the mitre root
CNA scorecard B 82/100 over 62 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Canonical apport Affected: 2.16.0 , < 2.37.0 (semver)
guessed Create a notification for this product.
Credits
Federico Quattrin Benjamin Drung
Show details on NVD website
To clipboard 

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