Local data disclosure via insecure backing-file creation
Published Jul 21, 2026 · Updated Jul 21, 2026
Information disclosure in Data::DisjointSet::Shared before 0.02 allows local users to read IPC payloads from shared backing files. The backing-file creation path in dsu.h calls open(path, O_RDWR|O_CREAT, 0666) without O_EXCL or O_NOFOLLOW, leaving a world-readable file under the default umask and accepting a planted file or symlink. Exploitation requires local access to the shared directory; a local user can read segment contents or redirect creation through a planted path.
Summary
What happened
Information disclosure in Data::DisjointSet::Shared before 0.02 allows local users to read IPC payloads from shared backing files. The backing-file creation path in dsu.h calls open(path, O_RDWR|O_CREAT, 0666) without O_EXCL or O_NOFOLLOW, leaving a world-readable file under the default umask and accepting a planted file or symlink. Exploitation requires local access to the shared directory; a local user can read segment contents or redirect creation through a planted path.
The record
- CVE
- CVE-2026-65069
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- Yegor Korablev
- Product
- Data::DisjointSet::Shared
- Classifications
- CWE-732, CWE-59, T1005
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 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?
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- Affected versionversion=0 <0.02
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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