CVE-2026-42496

Publication date 26 May 2026

Last updated 26 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
perl	26.04 LTS resolute	Fixed 5.40.1-7ubuntu0.1
	25.10 questing	Vulnerable
	24.04 LTS noble	Fixed 5.38.2-3.2ubuntu0.3
	22.04 LTS jammy	Fixed 5.34.0-3ubuntu1.7
	20.04 LTS focal	Fixed 5.30.0-9ubuntu0.5+esm2
	18.04 LTS bionic	Fixed 5.26.1-6ubuntu0.7+esm2
	16.04 LTS xenial	Fixed 5.22.1-9ubuntu0.9+esm2
	14.04 LTS trusty	Fixed 5.18.2-2ubuntu1.7+esm7

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Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.1 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	None

Scores

Parameter	Value
Base score	9.1 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N