CVE-2026-107856

MEDIUMPre-NVD 4.54.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (13th 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 week
4.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

CiviForm simplifies applications for government benefits programs by reusing applicant data across multiple benefit applications. Prior to 3.33.0, GET /admin/tiDash/editClientForm/:accountId verifies that the requester is a Trusted Intermediary but showEditClientForm performs a raw lookupAccount(accountId) without confirming that the citizen account belongs to the requester's trustedIntermediaryGroup. An authenticated Trusted Intermediary can enumerate accountId values and read the applicant display name, including the citizen's name and email address, for accounts outside the intermediary's group. This issue is fixed in version 3.33.0.

CVSS v3
4.5
EG Score
4.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA 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
Severity45% × 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
0.2%
EPSS %ILE
13th
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 9, 2026

Last Modified

October 9, 2026

Advisory Details (4)

Auto-updated Oct 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v3.33.0

Patch available: civiform/civiform v3.33.0

https://github.com/civiform/civiform/releases/tag/v3.33.0
github_commit

commit ccfd84ff2d9e (civiform/civiform)

Fix landed in civiform/civiform commit ccfd84ff2d9e — awaiting tagged release

https://github.com/civiform/civiform/commit/ccfd84ff2d9ee6570a1b1524c7ae3a3732e1839e
github_pr

Fix TI data access

Fix merged in civiform/civiform PR #13635 on 2026-07-20 — awaiting tagged release

https://github.com/civiform/civiform/pull/13635
githubMentions a patch (unverified)🟡 PoC Available

Trusted-Intermediary IDOR discloses any citizen's name and email · Advisory · civiform/civiform · GitHub

https://github.com/civiform/civiform/security/advisories/GHSA-qv7c-9hjr-9rv7

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 5× 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. 2026-10-10 21:32 UTCEG score recompute
  2. 2026-10-10 19:59 UTCEPSS rescore
  3. 2026-10-09 21:20 UTCEG score recompute
  4. 2026-10-09 20:40 UTCEG score recompute
  5. 2026-10-09 20:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-107856?
CVE-2026-107856 is a medium vulnerability published on October 9, 2026. CiviForm simplifies applications for government benefits programs by reusing applicant data across multiple benefit applications. Prior to 3.33.0, GET /admin/tiDash/editClientForm/:accountId verifies that the requester is a Trusted Intermediary but showEditClientForm performs a raw…
When was CVE-2026-107856 disclosed?
CVE-2026-107856 was first published on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107856 actively exploited?
CVE-2026-107856 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107856?
CVE-2026-107856 has a CVSS base score of 4.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107856?
A fix for CVE-2026-107856 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-2026-107856

Explore →

Is Your Infrastructure Affected by CVE-2026-107856?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs