CVE-2026-104956

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (29th percentile of EPSS-scored CVEs). 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: epss, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Plane is an open-source project management tool. Prior to 1.4.0, the unauthenticated public issues endpoint accepts group_by and sub_group_by query parameters and passes them without an allowlist to grouped paginators, where they are used as ORM field names by F(field), .values(field), .order_by(field), and Window partition_by operations. An anonymous attacker can supply arbitrary field paths that trigger an unhandled FieldError or KeyError and an HTTP 500 response, or force the ORM to resolve __-separated relational paths as a blind traversal oracle. This is the same field-name injection class addressed by earlier order_by sanitization, but that remediation left group_by and sub_group_by unvalidated. The issue does not directly disclose column values because issue_group_values() returns an empty list for unknown fields, the result projection uses a fixed required_fields list, and the subgrouped path raises KeyError before serialization. This issue is fixed in 1.4.0.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100CISA 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 computed
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; 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
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; 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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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/v1.4.0
github_commit

commit d3d3de44cf13 (makeplane/plane)

Fix landed in makeplane/plane commit d3d3de44cf13 — awaiting tagged release

https://github.com/makeplane/plane/commit/d3d3de44cf13991025783c598d8b34229fb47729
github_pr

[WEB-8012] fix: prevent ORM group_by/sub_group_by injection in issue endpoints

Fix merged in makeplane/plane PR #9347 on 2026-07-13 — awaiting tagged release

https://github.com/makeplane/plane/pull/9347
githubMentions a patch (unverified)🟡 PoC Available

Unauthenticated ORM field-name injection via `group_by`/`sub_group_by` on public deploy boards (DoS + blind oracle) · Advisory · makeplane/plane · GitHub

https://github.com/makeplane/plane/security/advisories/GHSA-wwgj-929g-42cm

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× 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.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-08 17:31 UTCEG score recompute
  3. 2026-10-08 17:11 UTCEPSS rescore
  4. 2026-10-07 23:47 UTCEPSS rescore
  5. 2026-10-06 19:27 UTCEG score recompute
  6. 2026-10-06 15:17 UTCEPSS rescore
  7. 2026-10-05 20:26 UTCEG score recompute
  8. 2026-10-05 19:22 UTCEG score recompute
  9. 2026-10-05 17:28 UTCEG score recompute
  10. 2026-10-05 16:51 UTCEG score recompute
  11. 2026-10-05 16:51 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-104956?
CVE-2026-104956 is a medium vulnerability published on October 5, 2026. Plane is an open-source project management tool. Prior to 1.4.0, the unauthenticated public issues endpoint accepts groupby and subgroupby query parameters and passes them without an allowlist to grouped paginators, where they are used as ORM field names by F(field), .values(field),…
When was CVE-2026-104956 disclosed?
CVE-2026-104956 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.
Is CVE-2026-104956 actively exploited?
CVE-2026-104956 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104956?
CVE-2026-104956 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104956?
A fix for CVE-2026-104956 is available: update to the fixed version the vendor names in its advisory.

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