CVE-2026-19264 (GCVE-0-2026-19264)

Vulnerability from cvelistv5 – Published: 2026-08-07 14:15 – Updated: 2026-08-24 11:15
VLAI
Title
Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover
Summary
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 17:54 UTC
CWE
Assigner
postiz CNA under the mitre root
CNA scorecard – unranked: 8 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
gitroomhq postiz-app Affected: 0 , < 2.22.1 (custom)
guessed Create a notification for this product.
Date Public
2026-08-07 14:14
Credits
KRITHIK BABU P Enno Gelhaus Nevo David
Show details on NVD website
To clipboard 

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