CVE-2026-96276CWE-22path-traversal

CVE-2026-96276

Medium · published September 23, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak build-init --writable-sdk --sdk-extension` with that SDK, attacker-chosen files could be written outside the working directory, since the target path is resolved via a function that allows `..` traversal.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00372 · 30.0th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-09-23T19:17Z
References (3)
https://access.redhat.com/security/cve/CVE-2026-96276 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2539418 · [email protected]https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm · [email protected]
EPSS history
Timeline
  • 25 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 23 SEP 15:01Z
    Flatpak: flatpak: arbitrary write in host context via flatpak build-init
    cvelistv5