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Vulnerability record · CVE-2026-32935 · published 20 March 2026

CVE-2026-32935: Phpseclib vulnerability

Phpseclib · Phpseclib

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.

8.2 CVSS 4.0 High EPSS 0.42% · top 66.2% CWE-208 · CWE-208
8.2CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/phpseclib/phpseclib/commit/ccc21aef71eb170e9bf819b167e67d1fd9e6e788 Patch
https://github.com/phpseclib/phpseclib/security/advisories/GHSA-94g3-g5v7-q4jg PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2023-52892Phpseclib interpretation conflict vulnerabilityIn phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are inco…EPSS 0.38%7.5CVE-2024-27354Phpseclib uncontrolled resource consumption vulnerabilityAn issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate c…EPSS 0.60%7.5CVE-2024-27355Phpseclib uncontrolled resource consumption vulnerabilityAn issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a ce…EPSS 0.57%7.5CVE-2023-49316Phpseclib vulnerabilityIn Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.EPSS 0.78%7.5CVE-2023-27560Phpseclib vulnerabilityMath/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.EPSS 0.81%7.5CVE-2021-30130Phpseclib improper verification of cryptographic signature vulnerabilityphpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.EPSS 1.1%5.8CVE-2026-55599Phpseclib server-side request forgery (ssrf) vulnerabilityphpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certi…EPSS 0.21%3.7CVE-2026-40194Phpseclib vulnerabilityphpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() …EPSS 0.37%

Source: NIST National Vulnerability Database (record CVE-2026-32935), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.