CVE-2026-71981Network attack vectorHinoki check available

Authenticated command execution via logout object deserialization

Published Sep 1, 2026 · Updated Sep 2, 2026

PHP object injection in Cypht before 2.12.2 allows remote authenticated users to execute operating system commands through logout requests. The logout handler base64-decodes the back_query GET parameter and passes the result directly to unserialize(), allowing a crafted object graph to invoke a gadget chain. A valid account and network access to the web application are required, and commands run with the web server process's permissions.

CVSS severity8.8
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

PHP object injection in Cypht before 2.12.2 allows remote authenticated users to execute operating system commands through logout requests. The logout handler base64-decodes the back_query GET parameter and passes the result directly to unserialize(), allowing a crafted object graph to invoke a gadget chain. A valid account and network access to the web application are required, and commands run with the web server process's permissions.

The record

CVE
CVE-2026-71981
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
Cypht
Product
Cypht
Classifications
CWE-502, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.12.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cypht · Cyphtversion=0 <2.12.2

Published CVSS scores

8.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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