CVE-2026-40044 | Pachno 1.0.6 contains a deserialization vulnerability that a… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-40044
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-04-08 13:39 UTC
Published: 2026-04-13 18:11 UTC
Last updated: 2026-05-12 01:46 UTC
Primary CWE: CWE-502
Deserialization of Untrusted Data
Vendor / Product: Pachno / Pachno
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Pachno	Pachno	—	1.0.6

Weakness (CWE)

CWE	Source	Description
CWE-502	cna	Deserialization of Untrusted Data

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	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

References (2)

Zero Science Lab Disclosure https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5986.php
VulnCheck Advisory: Pachno 1.0.6 FileCache Deserialization Remote Code Execution https://www.vulncheck.com/advisories/pachno-filecache-deserialization-remote-code-execution