Vulnerability · Published Oct 18, 2026 · Assigned by VulDB
CVE-2026-111869makeplane API Endpoint reliance on untrusted inputs in a security decision
Medium 5.3
In plain English
A medium-severity improper input validation in plane from makeplane. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 55.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was identified in makeplane plane up to 1.4.2. Impacted is an unknown function of the component API Endpoint. Such manipulation of the argument X-Forwarded-For leads to reliance on untrusted inputs in a security decision. It is possible to launch the attack remotely. The exploit is publicly available and might be used.
Affected products (as reported)
Weakness: CWE-807, CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C
References
- VDB-421581 | makeplane API Endpoint reliance on untrusted inputs in a security decision vdb-entry, technical-description
- VDB-421581 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-111869 | CVE Analysis and Report third-party-advisory
- Submit #1004923 | makeplane plane <=1.4.2 Use of Less Trusted Source third-party-advisory
- Submit #1005105 | GitHub Plane Community Edition / Plane Self-Hosted v0.14-dev through v1.4.2 Unauthenticated User Enumeration with Authentication Rate-Limit (Duplicate) third-party-advisory
- https://github.com/makeplane/plane/issues/9913 exploit, issue-tracking
- https://github.com/makeplane/plane/ product