CVE-2026-39843 — Plane has a Server-Side Request Forgery (SSRF) in Favicon Fetching

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
makeplane / plane	affected >= 0.28.0, < 1.3.0

CWE

CWE-918

References

https://github.com/makeplane/plane/security/advisories/GHSA-9fr2-pprw-pp9j

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.