CVE-2026-100306

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-25. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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

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

TDuck survey form through 6.0 fails to validate write passwords on submission endpoints, enforcing the check only on the front end. Remote unauthenticated attackers can submit form entries directly to public submission APIs without providing the password by using the form key from share links.

CVSS v3
5.3
EG Score
5.3MEDIUMhigh 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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

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

September 25, 2026

Last Modified

September 30, 2026

Advisory Details (5)

Auto-updated Sep 25, 2026
No patch confirmed yet.
generic

TDuck survey form through 6.0 Write Password Bypass via Client-Side Enforcement | Advisories | VulnCheck

https://www.vulncheck.com/advisories/tduck-survey-form-through-6.0-write-password-bypass-via-client-side-enforcement
generic

tduck-survey-form/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormResultController.java at 43ffa9c993e38936fc4de7d8e5aee82bbaa19502 · TDuckCloud/tduck-survey-form · GitHub

https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormResultController.java#L152-L172
generic

tduck-survey-form/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormSettingController.java at 43ffa9c993e38936fc4de7d8e5aee82bbaa19502 · TDuckCloud/tduck-survey-form · GitHub

https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormSettingController.java#L154-L162
generic

GitHub - TDuckCloud/tduck-survey-form: 为企业提供「免费」表单问卷能力，「开箱即用」快速赋能业务 A questionnaire system that can be privatized and deployed - 填鸭表单问卷系统（tduck-survey-form）表单系统-问卷系统 · GitHub

https://github.com/TDuckCloud/tduck-survey-form
generic

cve-request-poc/tduck/poc_form_data_create_bypass.py at adffc39b78cad18cd489cbf7454853bf0f744b7f · LinYuanyi1/cve-request-poc · GitHub

https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_data_create_bypass.py

Vendor Advisories for CVE-2026-100306(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 28× 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. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 11:43 UTCEG score recompute
  3. 2026-10-04 11:42 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 13:29 UTCEG score recompute
  6. 2026-10-03 13:29 UTCGHSA enrichment
  7. 2026-10-02 15:15 UTCEG score recompute
  8. 2026-10-02 15:15 UTCGHSA enrichment
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-10-01 17:01 UTCGHSA enrichment
  11. 2026-09-30 18:41 UTCEG score recompute
  12. 2026-09-30 18:41 UTCGHSA enrichment
  13. 2026-09-30 17:29 UTCEG score recompute
  14. 2026-09-30 17:29 UTCGHSA enrichment
  15. 2026-09-30 15:02 UTCEPSS rescore
  16. 2026-09-29 19:13 UTCEG score recompute
  17. 2026-09-29 19:13 UTCGHSA enrichment
  18. 2026-09-29 15:20 UTCEPSS rescore
  19. 2026-09-28 20:58 UTCGHSA enrichment
  20. 2026-09-28 14:15 UTCGHSA enrichment
  21. 2026-09-27 16:01 UTCEG score recompute
  22. 2026-09-27 16:01 UTCGHSA enrichment
  23. 2026-09-26 17:48 UTCEG score recompute
  24. 2026-09-26 17:48 UTCGHSA enrichment
  25. 2026-09-26 15:58 UTCEPSS rescore
Show 3 more
  1. 2026-09-25 19:33 UTCEG score recompute
  2. 2026-09-25 18:57 UTCEG score recompute
  3. 2026-09-25 18:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100306?
CVE-2026-100306 is a medium vulnerability published on September 25, 2026. TDuck survey form through 6.0 fails to validate write passwords on submission endpoints, enforcing the check only on the front end. Remote unauthenticated attackers can submit form entries directly to public submission APIs without providing the password by using the form key from share links.
When was CVE-2026-100306 disclosed?
CVE-2026-100306 was first published on September 25, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100306 actively exploited?
CVE-2026-100306 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100306?
CVE-2026-100306 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-2026-100306?
No fix for CVE-2026-100306 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-100306 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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