CVE-2026-42496 Affecting perl-constant package, versions <0:1.33-1001.module+el8.10.0+90354+a7e78d72


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.43% (35th percentile)

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  • Snyk IDSNYK-ORACLE8-PERLCONSTANT-17757095
  • published1 Jul 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-42496  (opens in a new tab)

How to fix?

Upgrade Oracle:8 perl-constant to version 0:1.33-1001.module+el8.10.0+90354+a7e78d72 or higher.
This issue was patched in ELSA-2026-30851.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl-constant package and not the perl-constant package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory.

_make_special_file() passes the tar header's linkname to symlink() without validating it against absolute paths or .. segments. The secure-extract mode check that guards regular file extraction does not cover the symlink target.

A subsequent open through the extracted name reads or writes the attacker chosen path.

CVSS Base Scores

version 3.1