Description
phpseclib is a PHP secure communications library. Projects using versions 0.1.1 through 1.0.26, 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.
Published: 2026-03-20
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4518-1 phpseclib security update
Debian DSA Debian DSA DSA-6185-1 phpseclib security update
Debian DSA Debian DSA DSA-6186-1 php-phpseclib security update
Debian DSA Debian DSA DSA-6187-1 php-phpseclib3 security update
Github GHSA Github GHSA GHSA-94g3-g5v7-q4jg phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack
History

Fri, 08 May 2026 16:00:00 +0000

Type Values Removed Values Added
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. phpseclib is a PHP secure communications library. Projects using versions 0.1.1 through 1.0.26, 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.

Mon, 23 Mar 2026 19:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}


Fri, 20 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 20 Mar 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Phpseclib
Phpseclib phpseclib
Vendors & Products Phpseclib
Phpseclib phpseclib

Fri, 20 Mar 2026 03:15:00 +0000

Type Values Removed Values Added
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.
Title phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack
Weaknesses CWE-208
References
Metrics cvssV4_0

{'score': 8.2, 'vector': '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'}


Subscriptions

Phpseclib Phpseclib
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-08T15:19:11.716Z

Reserved: 2026-03-17T00:05:53.282Z

Link: CVE-2026-32935

cve-icon Vulnrichment

Updated: 2026-03-20T16:32:14.624Z

cve-icon NVD

Status : Modified

Published: 2026-03-20T03:16:00.763

Modified: 2026-05-08T16:16:10.330

Link: CVE-2026-32935

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T19:15:14Z

Weaknesses