Is CVE-2026-105689 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105689 being exploited in the wild.

How severe is CVE-2026-105689?

Informational severity, published 5 October 2026.

Is there a fix for CVE-2026-105689?

Yes: fixed in 2.18.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-105689 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-105689?

Check whether you run Penpot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-105689: Penpot SSRF bypass via IPv6 transition addresses

CVE-2026-105689 · Severity: info · Published 2026-10-05

Penpot is an open-source design platform that allows users to import media and administrators to configure webhooks via URLs. A vulnerability in its SSRF protections allows an attacker to bypass blocklists by supplying IPv6 transition addresses (NAT64, 6to4, or Teredo) that embed restricted IPv4 targets. This could expose cloud metadata, internal services, or webhook response data to attackers in networks with NAT64 gateways or via DNS manipulation.

Technologies: Penpot. Vendors: Penpot.

Quick answers

Is CVE-2026-105689 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105689 being exploited in the wild.
How severe is CVE-2026-105689?: Informational severity, published 5 October 2026.
Which products and versions are affected?: Penpot before 2.18.0.
Is there a fix for CVE-2026-105689?: Yes: fixed in 2.18.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105689 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105689?: Check whether you run Penpot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.18.0

Technical details

The SSRF guard relied on Java InetAddress predicates that do not classify NAT64 (64:ff9b::/96), 6to4 (2002::/16), or Teredo (2001:0000::/32) addresses, allowing embedded IPv4 values to reach cloud metadata, loopback, and RFC 1918 targets. Exploitation requires either routing through a NAT64 gateway or control of a DNS AAAA record. Media import can disclose response bodies; webhook delivery exposes response status as a network-probing side channel. The vulnerability affects versions prior to 2.18.0.

Affected products

Penpot Penpot before 2.18.0

Timeline

2026-10-05: disclosed
2024-09-23: patched

References

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