Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-68558Wekan: SSRF filter bypass via DNS-resolving hostname in outgoing webhooks (incomplete fix of CVE-2026-53446)

High 8.5

In plain English

A high-severity server-side request forgery in wekan from wekan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.4%top 66.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Wekan is open source kanban built with Meteor. From 8.36 until 9.74, the outgoing webhook Integration URL validator in models/integrations.js checked only the literal URL.hostname against regular expressions, so DNS names such as 169-254-169-254.nip.io passed that first-line check. The delivery path's fetchSafe guard already blocked the reported IPv4 destination, but its separate IPv4-only resolver and duplicated blocklist created inconsistent all-address-family enforcement and drift risk between input-time and connection-time validation. Version 9.74 makes server/lib/ssrfGuard.js resolve all addresses with `dns.lookup({ all: true })`, validate every result through the shared isIpBlocked logic, pin the connection, and block redirects. This issue is fixed in version 9.74.

Affected products (as reported)

Vendor	Product	Versions
wekan	wekan	>= 8.36, < 9.74

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

https://github.com/wekan/wekan/security/advisories/GHSA-66m2-4wfr-c45p x_refsource_CONFIRM
https://github.com/wekan/wekan/commit/ef845fe4a0adb82af436313310939cd48c0b1347 x_refsource_MISC
https://github.com/wekan/wekan/releases/tag/v9.74 x_refsource_MISC