CVE-2026-19862

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-09-06. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and spoof the sender. Exploitation requires the site to be configured to take one of the message's addresses from a form field.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

JetFormBuilder < 3.6.5.2 – Unauthenticated Email Header Injection via Send Email Action | CVE 2026-19862 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/b3fe5552-6736-4479-9c61-c05bc3328b8e/

Vendor Advisories for CVE-2026-19862(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 17× in last 7d / 38× 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. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 13:14 UTCEG score recompute
  3. 2026-09-18 13:14 UTCGHSA enrichment
  4. 2026-09-17 13:54 UTCGHSA enrichment
  5. 2026-09-16 14:34 UTCEG score recompute
  6. 2026-09-16 14:34 UTCGHSA enrichment
  7. 2026-09-16 14:07 UTCEPSS rescore
  8. 2026-09-16 05:14 UTCEPSS rescore
  9. 2026-09-15 15:14 UTCEG score recompute
  10. 2026-09-15 15:14 UTCGHSA enrichment
  11. 2026-09-14 15:54 UTCEG score recompute
  12. 2026-09-14 15:54 UTCGHSA enrichment
  13. 2026-09-13 16:46 UTCEPSS rescore
  14. 2026-09-13 16:34 UTCGHSA enrichment
  15. 2026-09-12 17:14 UTCEG score recompute
  16. 2026-09-12 17:14 UTCGHSA enrichment
  17. 2026-09-12 15:00 UTCEPSS rescore
  18. 2026-09-11 17:54 UTCEG score recompute
  19. 2026-09-11 17:54 UTCGHSA enrichment
  20. 2026-09-11 14:52 UTCEPSS rescore
  21. 2026-09-11 09:36 UTCEPSS rescore
  22. 2026-09-10 18:34 UTCEG score recompute
  23. 2026-09-10 18:34 UTCGHSA enrichment
  24. 2026-09-10 09:34 UTCEPSS rescore
  25. 2026-09-09 19:14 UTCEG score recompute
Show 13 more
  1. 2026-09-09 19:14 UTCGHSA enrichment
  2. 2026-09-08 22:00 UTCEPSS rescore
  3. 2026-09-08 19:54 UTCGHSA enrichment
  4. 2026-09-08 10:12 UTCEG score recompute
  5. 2026-09-08 10:11 UTCGHSA enrichment
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-07 10:48 UTCEG score recompute
  8. 2026-09-07 10:48 UTCGHSA enrichment
  9. 2026-09-06 11:22 UTCEG score recompute
  10. 2026-09-06 10:49 UTCEG score recompute
  11. 2026-09-06 10:22 UTCEG score recompute
  12. 2026-09-06 09:39 UTCEG score recompute
  13. 2026-09-06 09:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19862?
CVE-2026-19862 is a medium vulnerability published on September 6, 2026. The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and…
When was CVE-2026-19862 disclosed?
CVE-2026-19862 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19862 actively exploited?
CVE-2026-19862 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 95.0% of all scored CVEs.
What is the CVSS score of CVE-2026-19862?
CVE-2026-19862 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-19862?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19862, 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

Explore the affected products and dependency analysis for CVE-2026-19862

Explore →

Is Your Infrastructure Affected by CVE-2026-19862?

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

Start Free Scan →Browse All CVEs