CVE-2026-62294
Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
5.1
Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"
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.
- Record
CVE-2026-62294- CVSS 4.0
- 5.1 Medium
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 - Weakness
- CWE-362, CWE-377
- Updated
- 2026-11-02
EUVDEUVD-2026-44675
5.1
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.
- Record
EUVD-2026-44675- CVSS 4.0
- 5.1 Medium
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 - Updated
- 2026-11-02
NVD
5.1
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.
- Record
CVE-2026-62294- CVSS 4.0
- 5.1 Medium
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 - Weakness
- CWE-362, CWE-377
- Updated
- 2026-11-02
OSV
5.1
Flameshot: OCTOU symlink attack via predictable /tmp path in Flameshot "Open With"
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.
- Record
CVE-2026-62294- CVSS 4.0
- 5.1 Medium
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 - Weakness
- CWE-362, CWE-377
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-62294
5.1
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.
- Record
DEBIAN-CVE-2026-62294- CVSS 4.0
- 5.1 Medium
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 - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-62294
5.1
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.
- Record
UBUNTU-CVE-2026-62294- CVSS 4.0
- 5.1 Medium
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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
flameshotDebian:12 |
All versions, plus listed versions 12.1.0+ds-112.1.0+ds-212.1.0+ds-312.1.0+ds-412.1.0-2 Show 11 moreShow less12.1.0-313.3.0+git20251204-113.3.0+git20251204-1~bpo13+113.3.0+git20251204-213.3.0-113.3.0-1~bpo13+113.3.0-214.0.0-114.0.0-214.0.0-314.0.0-4 |
None known |
flameshotDebian:13 |
All versions, plus listed versions 12.1.0+ds-212.1.0+ds-312.1.0+ds-413.3.0+git20251204-113.3.0+git20251204-1~bpo13+1 Show 8 moreShow less13.3.0+git20251204-213.3.0-113.3.0-1~bpo13+113.3.0-214.0.0-114.0.0-214.0.0-314.0.0-4 |
None known |
flameshotDebian:14 |
before 14.0.0-1, plus listed versions 12.1.0+ds-212.1.0+ds-312.1.0+ds-413.3.0+git20251204-113.3.0+git20251204-1~bpo13+1 Show 4 moreShow less13.3.0+git20251204-213.3.0-113.3.0-1~bpo13+113.3.0-2 |
14.0.0-1 |
flameshotUbuntu:18.04:LTS |
All versions, plus listed versions 0.5.0+git20180114-10.5.0+git20180222-10.5.1-10.5.1-2 |
None known |
flameshotUbuntu:20.04:LTS |
All versions, plus listed versions 0.6.0+git20190714-10.6.0+git20191001-10.6.0+git20191001-2 |
None known |
flameshotUbuntu:22.04:LTS |
All versions, plus listed versions 0.9.0+ds1-20.10.1+ds1-10.10.2+ds1-10.10.2+ds1-20.10.2+ds1-311.0~rc1+ds1-111.0~rc1+ds1-211.0.0-2 |
None known |
flameshotUbuntu:24.04:LTS |
All versions, plus listed versions 12.1.0-212.1.0-2build112.1.0-2build2 |
None known |
flameshotUbuntu:26.04:LTS |
All versions, plus listed versions 12.1.0+ds-212.1.0+ds-312.1.0+ds-413.3.0-113.3.0-213.3.0+git20251204-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-62294 is a medium vulnerability (CVSS 5.1) in Flameshot-org Flameshot, published July 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. Fixed in flameshot 14.0.0-1.
References
github.com/flameshot-org/flameshot/security/advisories/GHSA-fqqf-4rj8-c392
github.com/flameshot-org/flameshot/pull/4716
github.com/flameshot-org/flameshot/commit/936716b8d8b7052be461c3d5e2f88492b6eb3b96
github.com/flameshot-org/flameshot/releases/tag/v14.0.0
github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62294.json
nvd.nist.gov/vuln/detail/CVE-2026-62294
security-tracker.debian.org/tracker/CVE-2026-62294
ubuntu.com/security/CVE-2026-62294
cve.org/CVERecord?id=CVE-2026-62294