Login Request a demo
High severity · published Oct 5, 2026
CVE-2026-104977
Plane: Incomplete fix of CVE-2026-27706 — SSRF still reachable on: missing is_blocked_ip (CGNAT/multicast) + DNS-rebinding TOCTOU
7.7
CVSS
0.3%
EPSS
No
On KEV
Description
Plane is an open-source project management tool. Prior to 1.4.0, the fix for CVE-2026-27706 and GHSA-jcc6-f9v6-f7jw, an SSRF in work-item link unfurling shipped in v1.2.2, remains incomplete in the v1.3.1 GA release. Any authenticated project member can make the server fetch attacker-selected internal targets, including cloud metadata at 169.254.169.254, and read the response body returned as the link title or favicon. Complete hardening exists on main in PR 9163 but was not included in an earlier released tag. This issue is fixed in 1.4.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PL
plane · makeplane
< 1.4.0 · source: vendor
Affected product
PL
plane
makeplane
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104977
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104977
x_refsource_CONFIRM
https://github.com/makeplane/plane/security/advisories/GHSA-hhj8-7hv6-m74r
x_refsource_MISC
https://github.com/makeplane/plane/pull/9163
x_refsource_MISC
https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615
x_refsource_MISC
https://github.com/makeplane/plane/releases/tag/v1.4.0
More from plane
9.9
CVE-2026-105636
Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)
9.8
CVE-2026-105641
Plane: Hardcoded SECRET_KEY and LIVE_SERVER_SECRET_KEY shipped in aio/cli community deployment manifests — session forgery and live-server auth bypass
9.8
CVE-2026-105639
Plane: Pre-auth workspace invitation hijack via email-squat and self-served invitation token leak in Plane
9.6
CVE-2026-105637
Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEndpoint' (sibling of CVE-2026-46558)
9.1
CVE-2026-105640
Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed GitLab)