What is CVE-2026-40044?

CVE-2026-40044 is a critical-severity vulnerability in Pachno, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-13.

How severe is CVE-2026-40044?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Pachno

CVE-2026-40044

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 cac…

Vulnerability class: Insecure Deserialization

EPSS: 0.002 (45.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Pachno — versions 1.0.6
Pancho Pachno — versions 1.0.6

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

Zero Science Lab Disclosure (third-party-advisory)
VulnCheck Advisory: Pachno 1.0.6 FileCache Deserialization Remote Code Execution (third-party-advisory)

Frequently asked questions

What is CVE-2026-40044?: CVE-2026-40044 is a critical-severity vulnerability in Pachno, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-13.
How severe is CVE-2026-40044?: Critical severity. CVSS v3 base score is 9.8 out of 10.