What’s Vulnerable › Vulnerabilities

CVE-2026-35345: uutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-22 · updated 2026-10-26
• Weakness: CWE-59

Description

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Affected products

• Uutils coreutils: all versions

References

• https://github.com/uutils/coreutils/issues/10328
• https://github.com/uutils/coreutils/issues/10328

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