# CVE-2026-32935: php-seclib: phpseclib is a PHP secure communications library

CVE-2026-32935 is fixed in 4 products on 1 platform, first by php-seclib 1.0.9-1ubuntu0.1~esm2, released March 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-32935
- Priority: Routine
- CVSS: 5.9 (Medium)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 19, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | php-phpseclib Debian 12.15 (bookworm) | 2.0.42-1+deb12u3 | [DSA-6186-1](https://patchblox.com/security/data/fix/linux/dsa-6186-1.md) | Mar 29, 2026 |
| Linux | php-phpseclib Debian 13.5 (trixie) | 2.0.48-3+deb13u1 | [DSA-6186-1](https://patchblox.com/security/data/fix/linux/dsa-6186-1.md) | Mar 29, 2026 |
| Linux | php-phpseclib Debian 14 | 2.0.52-1 | [DEBIAN-CVE-2026-32935](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32935.md) | Mar 20, 2026 |
| Linux | php-phpseclib Ubuntu 18.04.6 LTS (bionic) | 2.0.9-1ubuntu0.1~esm3 | [php-phpseclib 2.0.9-1ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-php-phpseclib-2.0.9-1ubuntu0.1-esm3.md) | May 12, 2026 |
| Linux | php-phpseclib Ubuntu 20.04 LTS (focal) | 2.0.23-2ubuntu0.1~esm3 | [php-phpseclib 2.0.23-2ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-php-phpseclib-2.0.23-2ubuntu0.1-esm3.md) | May 12, 2026 |
| Linux | php-phpseclib Ubuntu 22.04.1 LTS (jammy) | 2.0.36-1ubuntu0.1~esm3 | [php-phpseclib 2.0.36-1ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-php-phpseclib-2.0.36-1ubuntu0.1-esm3.md) | May 12, 2026 |
| Linux | php-phpseclib Ubuntu 24.04.5 LTS (noble) | 2.0.47-1ubuntu0.1~esm1 | [php-phpseclib 2.0.47-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-php-phpseclib-2.0.47-1ubuntu0.1-esm1.md) | May 12, 2026 |
| Linux | php-phpseclib Ubuntu 26.04.1 LTS (resolute) | 2.0.51-1ubuntu0.1~esm1 | [php-phpseclib 2.0.51-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-php-phpseclib-2.0.51-1ubuntu0.1-esm1.md) | May 12, 2026 |
| Linux | php-phpseclib3 Debian 12.15 (bookworm) | 3.0.19-1+deb12u4 | [DSA-6187-1](https://patchblox.com/security/data/fix/linux/dsa-6187-1.md) | Mar 29, 2026 |
| Linux | php-phpseclib3 Debian 13.5 (trixie) | 3.0.43-2+deb13u1 | [DSA-6187-1](https://patchblox.com/security/data/fix/linux/dsa-6187-1.md) | Mar 29, 2026 |
| Linux | php-phpseclib3 Debian 14 | 3.0.50-1 | [DEBIAN-CVE-2026-32935](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32935.md) | Mar 20, 2026 |
| Linux | php-seclib Ubuntu 18.04.6 LTS (bionic) | 1.0.9-1ubuntu0.1~esm2 | [php-seclib 1.0.9-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-php-seclib-1.0.9-1ubuntu0.1-esm2.md) | Mar 19, 2026 |
| Linux | php-seclib Ubuntu 20.04 LTS (focal) | 1.0.18-2ubuntu0.1~esm2 | [php-seclib 1.0.18-2ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-php-seclib-1.0.18-2ubuntu0.1-esm2.md) | Mar 19, 2026 |
| Linux | php-seclib Ubuntu 22.04.1 LTS (jammy) | 1.0.20-1+deb12u3build0.22.04.1 | [php-seclib 1.0.20-1+deb12u3build0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-php-seclib-1.0.20-1-deb12u3build0.22.04.1.md) | Mar 19, 2026 |
| Linux | php-seclib Ubuntu 24.04.5 LTS (noble) | 1.0.23-1ubuntu0.1~esm1 | [php-seclib 1.0.23-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-php-seclib-1.0.23-1ubuntu0.1-esm1.md) | Mar 19, 2026 |
| Linux | php-seclib Ubuntu 26.04.1 LTS (resolute) | 1.0.24-1ubuntu0.1~esm1 | [php-seclib 1.0.24-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-php-seclib-1.0.24-1ubuntu0.1-esm1.md) | Mar 19, 2026 |
| Linux | phpseclib Debian 12.15 (bookworm) | 1.0.20-1+deb12u3 | [DSA-6185-1](https://patchblox.com/security/data/fix/linux/dsa-6185-1.md) | Mar 29, 2026 |
| Linux | phpseclib Debian 13.5 (trixie) | 1.0.23-6+deb13u1 | [DSA-6185-1](https://patchblox.com/security/data/fix/linux/dsa-6185-1.md) | Mar 29, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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