Restricted-file write via video-decoder symlink race
Published Sep 7, 2026 · Updated Sep 7, 2026
Path policy bypass in ImageMagick before 7.1.2-30 and 6.9.13-55 allows local users to write files to denied locations. The video decoder validates a destination path before opening it, permitting a symlink to be replaced after the check but before the write. Exploitation requires low-privileged local access, a configured path-policy write restriction, and winning the race; the reported impact is limited file modification.
Summary
What happened
Path policy bypass in ImageMagick before 7.1.2-30 and 6.9.13-55 allows local users to write files to denied locations. The video decoder validates a destination path before opening it, permitting a symlink to be replaced after the check but before the write. Exploitation requires low-privileged local access, a configured path-policy write restriction, and winning the race; the reported impact is limited file modification.
The record
- CVE
- CVE-2026-86424
- Published
- Sep 7, 2026
- Updated
- Sep 7, 2026
- Vendor
- ImageMagick Studio LLC
- Product
- ImageMagick
- Classifications
- CWE-367, CWE-59
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 7, 2026CVE publishedPublication date reported by the CVE source.
- Sep 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <6.9.13-55
- Affected versionversion=0 <7.1.2-30
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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