CVE-2026-32935

HIGH

phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack

Title source: cna
STIX 2.1

Description

phpseclib is a PHP secure communications library. Projects using versions 1.0.26 and below, 2.0.0 through 2.0.51, and 3.0.0 through 3.0.49 are vulnerable to a to padding oracle timing attack when using AES in CBC mode. This issue has been fixed in versions 1.0.27, 2.0.52 and 3.0.50.

References (2)

Scores

CVSS v4 8.2
EPSS 0.0002
EPSS Percentile 5.4%
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-208
Status published
Products (4)
phpseclib/phpseclib < 1.0.27
phpseclib/phpseclib >= 2.0.0, < 2.0.52
phpseclib/phpseclib 3.0.0 - 3.0.50Packagist
phpseclib/phpseclib >= 3.0.0, < 3.0.50
Published Mar 20, 2026
Tracked Since Mar 20, 2026