CVE-2026-41455Network attack vector

Authenticated internal service access via unvalidated webhook URLs

Published Apr 22, 2026 · Updated Apr 22, 2026

Server-side request forgery in WeKan before 8.35 allows remote authenticated users to send board event data to internal services. The integration URL schema accepts arbitrary schemes and destinations, and outgoing.js posts full event payloads without rejecting private or loopback targets. Board members able to create or modify integrations can reach internal services; two-way response handling also permits unauthorized comment-text overwrite.

CVSS severity6.3
Medium
EPSS probability0.24%
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 WeKan before 8.35 allows remote authenticated users to send board event data to internal services. The integration URL schema accepts arbitrary schemes and destinations, and outgoing.js posts full event payloads without rejecting private or loopback targets. Board members able to create or modify integrations can reach internal services; two-way response handling also permits unauthorized comment-text overwrite.

The record

CVE
CVE-2026-41455
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
WeKan
Product
WeKan
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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 <8.35.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WeKan · WeKanversion=0 <8.35.0

Published CVSS scores

8.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
6.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/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 exploitUnconfirmed

Weakness, pattern, technique

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

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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