CVE-2026-32935: phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack

March 19, 2026 (updated May 8, 2026)

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

References

github.com/advisories/GHSA-94g3-g5v7-q4jg
github.com/phpseclib/phpseclib
github.com/phpseclib/phpseclib/commit/ccc21aef71eb170e9bf819b167e67d1fd9e6e788
github.com/phpseclib/phpseclib/security/advisories/GHSA-94g3-g5v7-q4jg
nvd.nist.gov/vuln/detail/CVE-2026-32935

Code Behaviors & Features

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