CVE-2026-56779Public exploitNetwork attack vector

Authenticated SSRF via unvalidated tool download URLs

Published Jun 25, 2026 · Updated Jun 25, 2026

Server-side request forgery in FIT2CLOUD MaxKB before 2.10.0 allows remote authenticated users to access internal services via tool endpoints. ToolSerializer.Create.insert passes downloadCallbackUrl directly to requests.get(), while UpdateStoreTool.update_tool fetches download_url without host validation. The default workspace USER role is sufficient, and response and log differences expose internal port state.

CVSS severity5.3
Medium
EPSS probability0.29%
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 FIT2CLOUD MaxKB before 2.10.0 allows remote authenticated users to access internal services via tool endpoints. ToolSerializer.Create.insert passes downloadCallbackUrl directly to requests.get(), while UpdateStoreTool.update_tool fetches download_url without host validation. The default workspace USER role is sufficient, and response and log differences expose internal port state.

The record

CVE
CVE-2026-56779
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
KubeOperator
Product
MaxKB
Classifications
CWE-918, CAPEC-664, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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 <2.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KubeOperator · MaxKBversion=0 <2.10.0

Published CVSS scores

6.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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)
CAPEC-664Server Side Request Forgery
T1046Network Service Discovery

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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