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Vulnerability Details :

CVE-2026-39418

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-14 Apr, 2026 | 00:08
Updated At-14 Apr, 2026 | 15:54
Rejected At-
Credits

MaxKB: SSRF via sandbox network hook bypass

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, sandbox network protection can be bypassed by using socket.sendto() with the MSG_FASTOPEN flag. This allows authenticated user with tool-editing permissions to reach internal services that are explicitly blocked by the sandbox's banned hosts configuration. MaxKB's sandbox uses LD_PRELOAD to hook the connect() function and block connections to banned IPs, but Linux's sendto() with the MSG_FASTOPEN flag can establish TCP connections directly through the kernel without ever calling connect(), completely bypassing the IP validation. Although sendto is listed in the syscall() wrapper, this is ineffective because glibc invokes the kernel syscall directly rather than routing through the hooked syscall() function. This issue has been fixed in version 2.8.0.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:14 Apr, 2026 | 00:08
Updated At:14 Apr, 2026 | 15:54
Rejected At:
â–¼CVE Numbering Authority (CNA)
MaxKB: SSRF via sandbox network hook bypass

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, sandbox network protection can be bypassed by using socket.sendto() with the MSG_FASTOPEN flag. This allows authenticated user with tool-editing permissions to reach internal services that are explicitly blocked by the sandbox's banned hosts configuration. MaxKB's sandbox uses LD_PRELOAD to hook the connect() function and block connections to banned IPs, but Linux's sendto() with the MSG_FASTOPEN flag can establish TCP connections directly through the kernel without ever calling connect(), completely bypassing the IP validation. Although sendto is listed in the syscall() wrapper, this is ineffective because glibc invokes the kernel syscall directly rather than routing through the hooked syscall() function. This issue has been fixed in version 2.8.0.

Affected Products
Vendor
1Panel (FIT2CLOUD Inc.)1Panel-dev
Product
MaxKB
Versions
Affected
  • < 2.8.0
Problem Types
TypeCWE IDDescription
CWECWE-918CWE-918: Server-Side Request Forgery (SSRF)
Type: CWE
CWE ID: CWE-918
Description: CWE-918: Server-Side Request Forgery (SSRF)
Metrics
VersionBase scoreBase severityVector
3.15.0MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-w9g4-q3gm-6q6w
x_refsource_CONFIRM
https://github.com/1Panel-dev/MaxKB/commit/4d06362750b15390437f1d2e4d14ec79baef8559
x_refsource_MISC
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
x_refsource_MISC
Hyperlink: https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-w9g4-q3gm-6q6w
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/1Panel-dev/MaxKB/commit/4d06362750b15390437f1d2e4d14ec79baef8559
Resource:
x_refsource_MISC
Hyperlink: https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
Resource:
x_refsource_MISC
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:14 Apr, 2026 | 01:16
Updated At:20 Apr, 2026 | 17:36

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, sandbox network protection can be bypassed by using socket.sendto() with the MSG_FASTOPEN flag. This allows authenticated user with tool-editing permissions to reach internal services that are explicitly blocked by the sandbox's banned hosts configuration. MaxKB's sandbox uses LD_PRELOAD to hook the connect() function and block connections to banned IPs, but Linux's sendto() with the MSG_FASTOPEN flag can establish TCP connections directly through the kernel without ever calling connect(), completely bypassing the IP validation. Although sendto is listed in the syscall() wrapper, this is ineffective because glibc invokes the kernel syscall directly rather than routing through the hooked syscall() function. This issue has been fixed in version 2.8.0.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.0MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Primary3.17.4HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Type: Secondary
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Type: Primary
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
CPE Matches

maxkb
maxkb
>>maxkb>>Versions before 2.8.0(exclusive)
cpe:2.3:a:maxkb:maxkb:*:*:*:*:-:*:*:*
Weaknesses
CWE IDTypeSource
CWE-918Primarysecurity-advisories@github.com
CWE ID: CWE-918
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/1Panel-dev/MaxKB/commit/4d06362750b15390437f1d2e4d14ec79baef8559security-advisories@github.com
Patch
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0security-advisories@github.com
Release Notes
https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-w9g4-q3gm-6q6wsecurity-advisories@github.com
Vendor Advisory
Hyperlink: https://github.com/1Panel-dev/MaxKB/commit/4d06362750b15390437f1d2e4d14ec79baef8559
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-w9g4-q3gm-6q6w
Source: security-advisories@github.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Action-Not Available
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Product-netweaver_application_server_abapNetWeaver AS for ABAP and ABAP Platform
CWE ID-CWE-918
Server-Side Request Forgery (SSRF)
CVE-2020-4529
Matching Score-4
Assigner-IBM Corporation
ShareView Details
Matching Score-4
Assigner-IBM Corporation
CVSS Score-7.3||HIGH
EPSS-0.11% / 28.81%
||
7 Day CHG~0.00%
Published-08 Jun, 2020 | 12:55
Updated-17 Sep, 2024 | 04:14
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

IBM Maximo Asset Management 7.6.0 and 7.6.1 is vulnerable to server side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks. IBM X-Force ID: 182713.

Action-Not Available
Vendor-IBM Corporation
Product-maximo_asset_managementMaximo Asset Management
CWE ID-CWE-918
Server-Side Request Forgery (SSRF)
Details not found