CVE-2026-76087

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. 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
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user's in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 23, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Sep 23, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Unauthenticated users can overwrite incomplete submissions via submit action · Advisory · verbb/formie · GitHub

https://github.com/verbb/formie/security/advisories/GHSA-584p-f93j-wpgc
github_release Patch Available

3.1.31

Patch available: verbb/formie 3.1.31

https://github.com/verbb/formie/releases/tag/3.1.31
github_release Patch Available

2.2.23

Patch available: verbb/formie 2.2.23

https://github.com/verbb/formie/releases/tag/2.2.23
github_commit Patch Available

commit 78a298ac3baf (verbb/formie)

Patch available: verbb/formie 3.1.31 (contains commit 78a298ac3baf)

https://github.com/verbb/formie/commit/78a298ac3baf85ac283988dfce9cd42c9b958f16
github_commit Patch Available

commit 323c2fe647a7 (verbb/formie)

Patch available: verbb/formie 2.2.23 (contains commit 323c2fe647a7)

https://github.com/verbb/formie/commit/323c2fe647a76fbccadf749728ee4ad9420efee1

Vendor Advisories for CVE-2026-76087(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
verbb/formie3.0.0 ... 3.1.9 (64 versions)3.1.31—

Weakness Classification(2)

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. 2026-09-24 14:34 UTCEG score recompute
  2. 2026-09-24 14:17 UTCEG score recompute
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 19:27 UTCEG score recompute
  5. 2026-09-23 18:45 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-76087?
CVE-2026-76087 is a high vulnerability published on September 23, 2026. Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a…
When was CVE-2026-76087 disclosed?
CVE-2026-76087 was first published in the National Vulnerability Database on September 23, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76087 actively exploited?
CVE-2026-76087 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 78.5% of all scored CVEs.
What is the CVSS score of CVE-2026-76087?
CVE-2026-76087 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-76087?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76087, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76087

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