{"id":"CVE-2026-62294","aliases":["DEBIAN-CVE-2026-62294","EUVD-2026-44675","GHSA-fqqf-4rj8-c392","UBUNTU-CVE-2026-62294"],"status":"published","title":"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.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00139,"percentile":0.03332,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362","CWE-377"],"published":"2026-07-15T14:20:43Z","modified":"2026-10-28T10:55:10Z","fixes":[{"ecosystem":"Debian:14","package":"flameshot","fixed_in":["14.0.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.1.0+ds-1","12.1.0+ds-2","12.1.0+ds-3","12.1.0+ds-4","12.1.0-2","12.1.0-3","13.3.0+git20251204-1","13.3.0+git20251204-1~bpo13+1","13.3.0+git20251204-2","13.3.0-1","13.3.0-1~bpo13+1","13.3.0-2","14.0.0-1","14.0.0-2","14.0.0-3","14.0.0-4"]},{"source":"osv","ecosystem":"Debian:13","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.1.0+ds-2","12.1.0+ds-3","12.1.0+ds-4","13.3.0+git20251204-1","13.3.0+git20251204-1~bpo13+1","13.3.0+git20251204-2","13.3.0-1","13.3.0-1~bpo13+1","13.3.0-2","14.0.0-1","14.0.0-2","14.0.0-3","14.0.0-4"]},{"source":"osv","ecosystem":"Debian:14","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.0.0-1"}]}],"versions":["12.1.0+ds-2","12.1.0+ds-3","12.1.0+ds-4","13.3.0+git20251204-1","13.3.0+git20251204-1~bpo13+1","13.3.0+git20251204-2","13.3.0-1","13.3.0-1~bpo13+1","13.3.0-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.5.0+git20180114-1","0.5.0+git20180222-1","0.5.1-1","0.5.1-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0+git20190714-1","0.6.0+git20191001-1","0.6.0+git20191001-2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.0+ds1-2","0.10.1+ds1-1","0.10.2+ds1-1","0.10.2+ds1-2","0.10.2+ds1-3","11.0~rc1+ds1-1","11.0~rc1+ds1-2","11.0.0-2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.1.0-2","12.1.0-2build1","12.1.0-2build2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"flameshot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.1.0+ds-2","12.1.0+ds-3","12.1.0+ds-4","13.3.0-1","13.3.0-2","13.3.0+git20251204-1"]}],"products":[{"vendor":"flameshot-org","product":"flameshot"}],"references":[{"url":"https://github.com/flameshot-org/flameshot/security/advisories/GHSA-fqqf-4rj8-c392","tags":["x_refsource_CONFIRM","advisory","report"]},{"url":"https://github.com/flameshot-org/flameshot/pull/4716","tags":["x_refsource_MISC","fix","report"]},{"url":"https://github.com/flameshot-org/flameshot/commit/936716b8d8b7052be461c3d5e2f88492b6eb3b96","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/flameshot-org/flameshot/releases/tag/v14.0.0","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62294.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62294","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-62294","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-62294","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-62294","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-62294","title":"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.","status":"published","published":"2026-07-15T14:20:43.746Z","modified":"2026-07-15T18:00:42.038Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-362","CWE-377"],"updated_at":"2026-11-02T14:20:14.665567Z"}],"euvd":[{"id":"EUVD-2026-44675","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.","status":"published","published":"2026-07-15T14:20:43Z","modified":"2026-07-15T18:00:42Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:19:52.35951Z"}],"nvd":[{"id":"CVE-2026-62294","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.","status":"published","published":"2026-07-15T15:16:49.01Z","modified":"2026-10-24T21:10:00.13Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/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","level":"medium","assessor":"secondary"}],"cwes":["CWE-362","CWE-377"],"updated_at":"2026-11-02T14:12:29.879716Z"}],"osv":[{"id":"CVE-2026-62294","title":"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.","status":"published","published":"2026-07-15T14:20:43.746Z","modified":"2026-10-28T10:55:10.87460637Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-362","CWE-377"],"updated_at":"2026-11-02T15:45:13.306117Z"},{"id":"DEBIAN-CVE-2026-62294","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.","status":"published","published":"2026-07-15T15:16:49.01Z","modified":"2026-10-25T09:47:28.720722776Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/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","level":"medium"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-62294","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.","status":"published","published":"2026-07-15T15:16:00Z","modified":"2026-07-22T11:41:04.62472929Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:56:43.630667Z"}]}}