Vulnerability Description
Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get(favicon_url, ...) with the default redirect-following. This vulnerability is fixed in 1.3.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Plane | Plane | >= 0.28.0, < 1.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/makeplane/plane/security/advisories/GHSA-9fr2-pprw-pp9jExploitVendor Advisory
FAQ
What is CVE-2026-39843?
CVE-2026-39843 is a vulnerability with a CVSS score of 7.7 (HIGH). Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery...
How severe is CVE-2026-39843?
CVE-2026-39843 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-39843?
Check the references section above for vendor advisories and patch information. Affected products include: Plane Plane.