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

MITTEL 5.9CVE-2026-32935 · GHSA-94g3-g5v7-q4jg · Published 20/03/2026 · updated 17/06/2026

Kurz gesagt

CVE-2026-32935 ist eine Schwachstelle (MITTEL (CVSS 5.9)) in phpseclib/phpseclib, phpseclib (phpseclib).
Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 0.39%, höher als bei 33.2% aller Schwachstellen.
Abhilfe: auf 1.0.27, 2.0.52, 3.0.50 oder neuer aktualisieren.

Package	Affected versions	Patched versions
phpseclib/phpseclib Packagist	`≥ 0.1.1, < 1.0.27≥ 2.0.0, < 2.0.52≥ 3.0.0, < 3.0.50`	`1.0.272.0.523.0.50`
phpseclib phpseclib	`≥ 2.0.0, < 2.0.52≥ 3.0.0, < 3.0.50< 1.0.27`	`2.0.523.0.501.0.27`

Description

Impact

Those using AES in CBC mode may be susceptible to a padding oracle timing attack.

Patches

https://github.com/phpseclib/phpseclib/commit/ccc21aef71eb170e9bf819b167e67d1fd9e6e788

Workarounds

Use AES in CTR, CFB or OFB modes

References

https://github.com/phpseclib/phpseclib/commit/ccc21aef71eb170e9bf819b167e67d1fd9e6e788

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.

References

phpseclib/phpseclib security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-32935 · ADVISORY
phpseclib/phpseclib commit ccc21ae · WEB
phpseclib/phpseclib · PACKAGE

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Package

Affected versions

Patched versions

phpseclib/phpseclib

Packagist

≥ 0.1.1, < 1.0.27≥ 2.0.0, < 2.0.52≥ 3.0.0, < 3.0.50

1.0.272.0.523.0.50

phpseclib

≥ 2.0.0, < 2.0.52≥ 3.0.0, < 3.0.50< 1.0.27

2.0.523.0.501.0.27

Description

NVD description

Weitere Schwachstellen in phpseclib/phpseclib

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