Insecure temporary files in Elio let local users overwrite files
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Elio through 1.13.0 creates temporary capture files at predictable paths for external preview commands. A local user with low privileges can pre-create symbolic links at those paths (CWE-377), so previewing media, fonts or archives truncates and overwrites files owned by the victim. An attacker who knows the victim's Elio process ID can plant the link, and the victim must preview a file for the overwrite to occur.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
Elio through 1.13.0 contains an insecure temporary file vulnerability that allows local users to overwrite another user's files by pre-creating symbolic links at predictable capture paths. Attackers who know the victim's Elio process ID can plant a symlink so previewing media, fonts or archives truncates and overwrites victim-owned files.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Elio.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Vendor assessments
Timeline
- 2026-10-13 Threatist record created from CVE-2026-110234
- 2026-10-13 Alias added: GHSA-h249-j3v7-74fw
- 2026-10-15 CISA SSVC decision points changed
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 4
- https://github.com/elio-fm/elio/blob/e7daae44ce748310de441499576bdc31b936d54c/src/preview/external_commands.rs#L14-L47
- https://github.com/elio-fm/elio/blob/e7daae44ce748310de441499576bdc31b936d54c/src/preview/external_commands.rs#L92-L95
- https://github.com/elio-fm/elio/blob/e7daae44ce748310de441499576bdc31b936d54c/src/preview/archives/external_tools.rs#L30-L45
- v1.13.0 Release Notes
Sources
- CVE-2026-110234 · CVE Program
- CVE-2026-110234 · NVD
- FIRST EPSS
- GHSA-h249-j3v7-74fw · GitHub Advisory Database · CC BY 4.0
- CVE-2026-110234 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences