CVE-2026-42473

CRITICALNVD 9.89.8—

9.8

Unsafe deserialization vulnerability in MixPHP Framework 2.x thru 2.2.17. The session and cache handlers use unserialize() on data from the filesystem in the FileHandler object.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 16.3%
KEV: Not listed

Published

May 1, 2026

Last Modified

May 5, 2026

Advisory Details (3)

Auto-updated May 9, 2026

No patch confirmed yet.

generic

mix/src/sync-invoke/src/Server.php at v2.2.17 · mix-php/mix · GitHub

https://github.com/mix-php/mix/blob/v2.2.17/src/sync-invoke/src/Server.php

generic

GitHub - mix-php/mix: ☄️ PHP CLI mode development framework, supports Swoole, WorkerMan, FPM, CLI-Server / PHP 命令行模式开发框架，支持 Swoole、Swow、WorkerMan、FPM、CLI-Server · GitHub

https://github.com/mix-php/mix

generic

MixPHP 2.x Deserialization RCE and SQL Injection (CVE-2026-37552, CVE-2026-42471 through 42475) · GitHub

https://gist.github.com/sgInnora/fa46386840fe978a30d7e53c458f2975

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 11:22 UTCepss_batch
2026-05-20 11:22 UTCepss_batch
2026-05-20 07:05 UTCEG score recompute
2026-05-20 07:05 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-42473?

CVE-2026-42473 is a critical vulnerability published on May 1, 2026. Unsafe deserialization vulnerability in MixPHP Framework 2.x thru 2.2.17. The session and cache handlers use unserialize() on data from the filesystem in the FileHandler object.

When was CVE-2026-42473 disclosed?

CVE-2026-42473 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-42473 actively exploited?

CVE-2026-42473 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-42473?

CVE-2026-42473 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2026-42473?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42473, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-42473

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

mix/src/sync-invoke/src/Server.php at v2.2.17 · mix-php/mix · GitHub

GitHub - mix-php/mix: ☄️ PHP CLI mode development framework, supports Swoole, WorkerMan, FPM, CLI-Server / PHP 命令行模式开发框架，支持 Swoole、Swow、WorkerMan、FPM、CLI-Server · GitHub

MixPHP 2.x Deserialization RCE and SQL Injection (CVE-2026-37552, CVE-2026-42471 through 42475) · GitHub

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-42473?

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Published

Last Modified

Advisory Details (3)

Frequently asked(5)

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