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GHSA-94g3-g5v7-q4jg

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

Source: GitHub Advisory Database (reviewed) High CVE-2026-32935

Packages

EcosystemPackageAffectedFixed in
Packagist phpseclib/phpseclib >= 3.0.0, < 3.0.50 3.0.50
Packagist phpseclib/phpseclib >= 2.0.0, < 2.0.52 2.0.52
Packagist phpseclib/phpseclib >= 0.1.1, < 1.0.27 1.0.27

Details

As written in the advisory (Markdown source, shown as plain text).

### 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

References

External links from the advisory. They lead to third-party sites.