CVE-2026-62294

Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"

State
Published
Severity
5.1 Medium
Published
Jul 15, 2026
Updated
Jul 15, 2026
Reserved
Jul 13, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.05.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:NGitHub_M

Weaknesses

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-377 Insecure Temporary File

Affected Products

ProductVersions
flameshotflameshot-org
  • < 14.0.0Affected

References

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