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

> Attackers can bypass SSRF filters in Wekan webhooks using DNS-resolving hostnames to access internal network resources.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-66m2-4wfr-c45p

## What is CVE-2026-68558?

CVE-2026-68558 is a high-severity server-side request forgery vulnerability in wekan, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-68558?


## How do I fix CVE-2026-68558?

No fix has been published for CVE-2026-68558 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-68558 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68558 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68558 and fix it if it is affected.

What it is: CVE-2026-68558 is a high-severity server-side request forgery vulnerability in wekan, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68558 exists.

Affected product: wekan. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-68558/ (Markdown: https://insights.sbomify.com/CVE-2026-68558/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68558
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68558
- OSV: https://osv.dev/vulnerability/CVE-2026-68558

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-68558/
Summaries are generated and may contain mistakes; the official description above is the record.