# CVE-2026-44167: php-phpseclib: phpseclib is a PHP secure communications library

CVE-2026-44167 is fixed in 3 products on 1 platform, first by php-phpseclib 2.0.9-1ubuntu0.1~esm3, released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-44167
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 12, 2026

## Description

phpseclib is a PHP secure communications library. Prior to 1.0.29, 2.0.54, and 3.0.52, anyone loading untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc). This is a bypass of CVE-2024-27355. This vulnerability is fixed in 1.0.29, 2.0.54, and 3.0.52.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | php-phpseclib Debian 12.15 (bookworm) | 2.0.42-1+deb12u5 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | php-phpseclib Debian 13.5 (trixie) | 2.0.48-3+deb13u3 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | php-phpseclib Debian 14 | 2.0.54-1 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | php-phpseclib Fedora 43 | 2.0.55-1.fc43 | [FEDORA-2026-B2CE3F8E3E](https://patchblox.com/security/data/fix/linux/fedora-2026-b2ce3f8e3e.md) | Aug 9, 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+deb12u6 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | php-phpseclib3 Debian 13.5 (trixie) | 3.0.43-2+deb13u3 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | php-phpseclib3 Debian 14 | 3.0.52-1 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | phpseclib Debian 12.15 (bookworm) | 1.0.20-1+deb12u5 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 2026 |
| Linux | phpseclib Debian 13.5 (trixie) | 1.0.23-6+deb13u3 | [DEBIAN-CVE-2026-44167](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44167.md) | May 27, 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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