Quick answers
- Is CVE-2026-111869 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111869 being exploited in the wild.
- How severe is CVE-2026-111869?
- Medium severity, with a CVSS score of 5.3, published 18 October 2026.
- Which products and versions are affected?
- Makeplane Plane v0.14-dev through v1.4.2.
- Is there a fix for CVE-2026-111869?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-111869 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-111869?
- Check whether you run Makeplane Plane 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.
Technical details
The vulnerability exists in the authentication rate-limiting mechanism which derives its throttle key from the X-Forwarded-For header without requiring a trusted proxy configuration (NUM_PROXIES is unset). An unauthenticated network attacker can rotate the X-Forwarded-For header value to bypass the AnonRateThrottle and exploit differential responses from multiple unauthenticated API endpoints to enumerate registered email addresses. The vulnerable components are in plane.authentication.views.app, plane.utils.ip_address, and plane.authentication.rate_limit modules, present since the authentication module was introduced.
Affected products
- makeplane plane v0.14-dev through v1.4.2
Timeline
- 2026-10-18: disclosed