What’s Vulnerable › Vulnerabilities

CVE-2026-62294: Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"

• Severity: medium (CVSS 5.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-362

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.

Affected products

• flameshot-org flameshot: before 14.0.0

References

• https://github.com/flameshot-org/flameshot/commit/936716b8d8b7052be461c3d5e2f88492b6eb3b96
• https://github.com/flameshot-org/flameshot/pull/4716
• https://github.com/flameshot-org/flameshot/releases/tag/v14.0.0
• https://github.com/flameshot-org/flameshot/security/advisories/GHSA-fqqf-4rj8-c392

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