CVE-2026-9538

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

26/05/2026

Last modified:

28/05/2026

Description

Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.<br /> <br /> _read_tar() reads each entry&#39;s payload with $handle->read($$data, $block), where $block is derived from the entry&#39;s 12-byte size field in the tar header with no upper bound on that value.<br /> <br /> A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High