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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.

PUBLISHED Reserved 2026-04-08 | Published 2026-04-13 | Updated 2026-05-12 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Deserialization of Untrusted Data

Product status

1.0.6
affected

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab finder

References

www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5986.php (Zero Science Lab Disclosure) third-party-advisory

www.vulncheck.com/...e-deserialization-remote-code-execution (VulnCheck Advisory: Pachno 1.0.6 FileCache Deserialization Remote Code Execution) third-party-advisory

cve.org (CVE-2026-40044)

nvd.nist.gov (CVE-2026-40044)

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