CVE-2026-86692

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data tampering.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-23 14:22 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-11-09 20:14 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-11-09 20:14 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: not scored yet.
• Severity: 5.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-11-09 20:14 UTC

Last modified

2026-11-09 20:14 UTC

Weakness

CWE-22 · Path traversal

Record status

Received

Affected

• Canonical Apport < 2.37.0

Attack profile CVSS 4.0 · 5.7

Attack vector

Local

Complexity

Low

Attack requirements

Present

Privileges needed

None

User interaction

Passive

Confidentiality

None

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-86692.md and follow it. Check whether this project is affected by CVE-2026-86692. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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