CVE Catalog

CVE-2026-116271

HighCVSS 7.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.13%

3th percentile - higher than 3% of all known CVEs

Summary

MIME::Parser::FileUnder versions before 5.521 for Perl reuse a pre-created output directory and follow symlinks in it, letting local users redirect attachment writes. When the output base is writable by others (e.g. /tmp), a local user can pre-create the directory with a symlink named like an attachment.

Risk Assessment

A local user can cause attachments to be written elsewhere with the parsing process's privileges, potentially overwriting files or escalating privileges.

Recommendation

Upgrade MIME::Parser::FileUnder (MIME-tools) to version 5.521 or later and avoid output directories writable by others.

Related vulnerabilities

Original NVD description (English source)

MIME::Parser::FileUnder versions before 5.521 for Perl reuse a pre-created output directory and follow symlinks in it, letting local users redirect attachment writes. Each message is written to a directory named msg-<time>-<pid>-<n> under the output base, and an existing directory of that name is used as is. A file name counts as unused when nothing exists at that path, which holds for a dangling symlink, and the body file is then opened in a way that follows the link. When the output base is writable by other users, as with output_under("/tmp"), a local user can pre-create the directory with a symlink named like an attachment. The parser then writes the attachment to the link target with the privileges of the parsing process.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS