CVE-2026-19264
Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover
Description
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.
INFO
Published Date :
Aug. 7, 2026, 3:17 p.m.
Last Modified :
Aug. 7, 2026, 3:17 p.m.
Remotely Exploit :
No
Source :
4cdc9741-f887-419a-a2fd-acbbd2729276
Affected Products
The following products are affected by CVE-2026-19264
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 4cdc9741-f887-419a-a2fd-acbbd2729276 | ||||
| CVSS 4.0 | CRITICAL | 4cdc9741-f887-419a-a2fd-acbbd2729276 | ||||
| CVSS 4.0 | CRITICAL | 4cdc9741-f887-419a-a2fd-acbbd2729276 |
Solution
- Normalize and validate all path segments.
- Enforce directory confinement for file access.
- Implement authentication for media access.
- Rotate exposed secrets immediately.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-19264.
| URL | Resource |
|---|---|
| https://gadvisory.org/advisories/PSA-2026-TH12B7 | |
| https://github.com/gitroomhq/postiz-app/commit/7936062 | |
| https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-19264 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-19264
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-19264 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-19264 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 4cdc9741-f887-419a-a2fd-acbbd2729276
Aug. 07, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'gitroomhq', 'product': 'postiz-app', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.22.1', 'versionType': 'semver'}], 'packageName': 'postiz-app', 'defaultStatus': 'unaffected'}] Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-22 Added Reference https://gadvisory.org/advisories/PSA-2026-TH12B7 Added Reference https://github.com/gitroomhq/postiz-app/commit/7936062 Added Reference https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1