CVE-2026-2556Public exploitNetwork attack vector

Authenticated SSRF via unrestricted MediaController URL

Published Feb 16, 2026 · Updated Feb 16, 2026

Server-side request forgery in Chatopera CSKeFu 8.0.0 and 8.0.1 allows remote authenticated users to issue server-side requests. The MediaController endpoint accepts the url argument as a request destination without enforcing destination restrictions. Low-privileged access is required, and the resulting requests can interact with resources reachable from the application server.

CVSS severity6.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Chatopera CSKeFu 8.0.0 and 8.0.1 allows remote authenticated users to issue server-side requests. The MediaController endpoint accepts the url argument as a request destination without enforcing destination restrictions. Low-privileged access is required, and the resulting requests can interact with resources reachable from the application server.

The record

CVE
CVE-2026-2556
Published
Feb 16, 2026
Updated
Feb 16, 2026
Vendor
Chatopera
Product
CSKeFu
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 16, 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=8.0.0
  2. Affected versionversion=8.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chatopera · CSKeFuversion=8.0.0; version=8.0.1

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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