Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ to change another user's project role. The role-update logic blocks only a new role higher than the requester's role, so assigning the equal Member role bypasses the insufficient validation and promotes a Project Guest with role 5 to Member without Project Admin approval. This unauthorized promotion grants the guest the additional project capabilities associated with the Member role and allows a regular member to bypass project governance controls. This issue is fixed in 1.4.0.
CVE-2026-104955
MEDIUMPre-NVD 5.45.4
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.4Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 5.4
- EG Score
- 5.4MEDIUMlow confidence
- EG Risk
- 29EG Risk 29/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity54% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 5, 2026
Last Modified
October 5, 2026
Advisory Details (4)
Auto-updated Oct 5, 2026🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
v1.4.0
Patch available: makeplane/plane v1.4.0
https://github.com/makeplane/plane/releases/tag/v1.4.0github_commit
commit 4c1bdd1d625f (makeplane/plane)
Fix landed in makeplane/plane commit 4c1bdd1d625f — awaiting tagged release
https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069egithub_pr
fix(api): use requester's workspace role in project member role updates (GHSA-x63v-p7wc-47x4)
Fix merged in makeplane/plane PR #9014 on 2026-05-05 — awaiting tagged release
https://github.com/makeplane/plane/pull/9014githubMentions a patch (unverified)🟡 PoC Available
Project Member can escalate Project Guest to Member via PATCH /project-members/{pk} (BAC / Privilege Escalation) · Advisory · makeplane/plane · GitHub
https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-05 17:28 UTCEG score recompute
- 2026-10-05 16:51 UTCEG score recompute
- 2026-10-05 16:51 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-285 · CWE-269
Frequently asked(4)
What is CVE-2026-104955?
CVE-2026-104955 is a medium vulnerability published on October 5, 2026. Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspaceslug}/projects/{projectid}/members/{member_pk}/ to change another user's project role. The role-update logic…
When was CVE-2026-104955 disclosed?
CVE-2026-104955 was first published on October 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-104955?
CVE-2026-104955 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-104955?
A fix for CVE-2026-104955 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-104955
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