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Vulnerability record · CVE-2026-40044 · published 13 April 2026

CVE-2026-40044: Deserialization of untrusted data vulnerability

Pachno 1.0.6 contains a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting malicious serialized objects into cache files. Attackers can write PHP object payloads to world-writable cache files with predictable names in the cache directory, which are unserialized during framework bootstrap before authentication checks occur.

9.3 CVSS 4.0 Critical EPSS 0.88% · top 42.5% CWE-502 · Deserialization of untrusted data Deferred
9.3CVSS 4.0 base score
0.88%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Pachno 1.0.6 contains a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting malicious serialized objects into cache files. Attackers can write PHP object payloads to world-writable cache files with predictable names in the cache directory, which are unserialized during framework bootstrap before authentication checks occur.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.vulncheck.com/advisories/pachno-filecache-deserialization-remote-code-execution
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5986.php

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Source: NIST National Vulnerability Database (record CVE-2026-40044), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.