CVE-2026-62294
Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"
Description
Flameshot is powerful yet simple to use screenshot software. Prior to 14.0.0, the Open With feature wrote screenshots to a predictable temporary path and followed symlinks, creating a time-of-check to time-of-use race that allowed a local unprivileged attacker on the same machine to pre-plant a symlink and cause Flameshot to write PNG data through it, overwriting any file the victim user could write. This issue is fixed in version 14.0.0.
INFO
Published Date :
July 15, 2026, 3:16 p.m.
Last Modified :
Oct. 24, 2026, 9:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Flameshot to version 14.0.0 or later.
- Ensure the "Open With" feature is configured securely.
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-2026-62294.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62294 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-2026-62294
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-2026-62294 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62294 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.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: flameshot de flameshot-org, Description: Flameshot es un software de captura de pantalla potente pero sencillo de usar. Antes de la versión 14.0.0, la función Abrir con escribía las capturas de pantalla en una ruta temporal predecible y seguía los enlaces simbólicos, creando una condición de carrera de tiempo de verificación a tiempo de uso que permitía a un atacante local sin privilegios en la misma máquina preestablecer un enlace simbólico y hacer que Flameshot escribiera datos PNG a través de él, sobrescribiendo cualquier archivo que el usuario víctima pudiera escribir. Este problema está solucionado en la versión 14.0.0. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 15, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-62294', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-15T17:59:53.344366Z'} -
New CVE Received by [email protected]
Jul. 15, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'flameshot-org', 'product': 'flameshot', 'versions': [{'status': 'affected', 'version': '< 14.0.0'}]}] Added Description Flameshot is powerful yet simple to use screenshot software. Prior to 14.0.0, the Open With feature wrote screenshots to a predictable temporary path and followed symlinks, creating a time-of-check to time-of-use race that allowed a local unprivileged attacker on the same machine to pre-plant a symlink and cause Flameshot to write PNG data through it, overwriting any file the victim user could write. This issue is fixed in version 14.0.0. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/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 CWE CWE-362 Added CWE CWE-377 Added Reference https://github.com/flameshot-org/flameshot/commit/936716b8d8b7052be461c3d5e2f88492b6eb3b96 Added Reference https://github.com/flameshot-org/flameshot/pull/4716 Added Reference https://github.com/flameshot-org/flameshot/releases/tag/v14.0.0 Added Reference https://github.com/flameshot-org/flameshot/security/advisories/GHSA-fqqf-4rj8-c392