CVE-2026-13221: perl through 5.43.9 (inclusive)

Affected technology

perl · through 5.43.9 (inclusive)
perl

Product not specified by the source · 0 to before 5.40.5-RC1, 5.41.0 to before 5.42.3-RC1, 5.43.0 to before 5.43.10
Vendor not specified by the source

Description’s affected range: versions before 5.40.5-RC1

Component: perl
Function: Perl_study_chunk
File: regcomp_study.c

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

NVD’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality impact as none; integrity and availability impact as high. Source advisory’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality impact as none; integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.