How severe is CVE-2026-37552?

CVE-2026-37552 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-37552 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-37552?

CVE-2026-37552 affects Openmix Mix Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-37552?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-37552 have an EU (EUVD) identifier?

Yes. CVE-2026-37552 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26670.

When was CVE-2026-37552 published?

CVE-2026-37552 was published on 2026-05-01 and last updated on 2026-07-08.

CVE-2026-37552

CVE-2026-37552 is a high-severity vulnerability in Openmix Mix Php with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.4)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26670
Weakness: CWE-502
Affected product: Openmix Mix Php
Published: 2026-05-01
Last modified: 2026-07-08

Description

Unsafe deserialization vulnerability in MixPHP Framework 2.x thru 2.2.17. The sync-invoke TCP server (Server.php:87) receives data from a TCP socket, passes it directly to Opis\Closure\unserialize(), then executes the result via call_user_func(). No authentication or signature verification exists on the TCP connection. An attacker with access to the localhost TCP port (server binds 127.0.0.1) can send a crafted serialized PHP closure to achieve arbitrary code execution.

Frequently asked questions

What is CVE-2026-37552?: Unsafe deserialization vulnerability in MixPHP Framework 2.x thru 2.2.17. The sync-invoke TCP server (Server.php:87) receives data from a TCP socket, passes it directly to Opis\Closure\unserialize(), then executes the result via call_user_func(). No authentication or signature verification exists on the TCP connection. An attacker with access to the localhost TCP port (server binds 127.0.0.1) can send a crafted serialized PHP closure to achieve arbitrary code execution.
How severe is CVE-2026-37552?: CVE-2026-37552 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-37552 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-37552?: CVE-2026-37552 affects Openmix Mix Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-37552?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-37552 have an EU (EUVD) identifier?: Yes. CVE-2026-37552 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26670.
When was CVE-2026-37552 published?: CVE-2026-37552 was published on 2026-05-01 and last updated on 2026-07-08.

References

Affected products (1)

cpe:2.3:a:openmix:mix_php:*:*:*:*:*:*:*:*

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