CVE-2026-82901

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-26. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in the 'uacf7_wpcf7_mail_components' function in all versions up to, and including, 3.5.50. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: This is only exploitable when the plugin's PDF Generator module is enabled, which is disabled by default.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
60
EG Risk 60/100CISA 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
Severity98% × 45%
Exploitation1% × 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
1.1%
EPSS %ILE
64th
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 none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 26, 2026

Last Modified

September 28, 2026

References (7)

Vendor Advisories for CVE-2026-82901(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 58× in last 7d / 68× 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 11:46 UTCGHSA enrichment
  2. 2026-10-04 07:56 UTCGHSA enrichment
  3. 2026-10-04 04:04 UTCGHSA enrichment
  4. 2026-10-04 00:13 UTCGHSA enrichment
  5. 2026-10-03 20:22 UTCGHSA enrichment
  6. 2026-10-03 16:32 UTCEG score recompute
  7. 2026-10-03 16:31 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 12:41 UTCGHSA enrichment
  10. 2026-10-03 08:50 UTCGHSA enrichment
  11. 2026-10-03 04:59 UTCGHSA enrichment
  12. 2026-10-03 01:08 UTCGHSA enrichment
  13. 2026-10-02 21:18 UTCEG score recompute
  14. 2026-10-02 21:17 UTCGHSA enrichment
  15. 2026-10-02 17:57 UTCEPSS rescore
  16. 2026-10-02 17:27 UTCGHSA enrichment
  17. 2026-10-02 13:34 UTCGHSA enrichment
  18. 2026-10-02 09:41 UTCGHSA enrichment
  19. 2026-10-02 05:51 UTCGHSA enrichment
  20. 2026-10-02 02:00 UTCGHSA enrichment
  21. 2026-10-01 22:10 UTCEG score recompute
  22. 2026-10-01 22:09 UTCGHSA enrichment
  23. 2026-10-01 19:50 UTCEPSS rescore
  24. 2026-10-01 18:13 UTCGHSA enrichment
  25. 2026-10-01 14:19 UTCGHSA enrichment
Show 43 more
  1. 2026-10-01 10:28 UTCGHSA enrichment
  2. 2026-10-01 06:37 UTCGHSA enrichment
  3. 2026-10-01 02:46 UTCGHSA enrichment
  4. 2026-09-30 22:56 UTCGHSA enrichment
  5. 2026-09-30 19:05 UTCGHSA enrichment
  6. 2026-09-30 15:14 UTCEG score recompute
  7. 2026-09-30 15:14 UTCGHSA enrichment
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-30 11:23 UTCGHSA enrichment
  10. 2026-09-30 07:32 UTCGHSA enrichment
  11. 2026-09-30 03:40 UTCGHSA enrichment
  12. 2026-09-29 23:47 UTCGHSA enrichment
  13. 2026-09-29 18:33 UTCEG score recompute
  14. 2026-09-29 18:33 UTCGHSA enrichment
  15. 2026-09-29 14:37 UTCGHSA enrichment
  16. 2026-09-29 10:46 UTCGHSA enrichment
  17. 2026-09-29 06:55 UTCGHSA enrichment
  18. 2026-09-29 03:05 UTCGHSA enrichment
  19. 2026-09-28 23:13 UTCEG score recompute
  20. 2026-09-28 23:12 UTCGHSA enrichment
  21. 2026-09-28 19:20 UTCGHSA enrichment
  22. 2026-09-28 15:26 UTCGHSA enrichment
  23. 2026-09-28 13:58 UTCEG score recompute
  24. 2026-09-28 13:58 UTCGHSA enrichment
  25. 2026-09-28 13:52 UTCEPSS rescore
  26. 2026-09-28 10:06 UTCGHSA enrichment
  27. 2026-09-28 06:14 UTCGHSA enrichment
  28. 2026-09-28 02:23 UTCGHSA enrichment
  29. 2026-09-27 22:33 UTCGHSA enrichment
  30. 2026-09-27 18:41 UTCGHSA enrichment
  31. 2026-09-27 14:50 UTCEG score recompute
  32. 2026-09-27 14:50 UTCGHSA enrichment
  33. 2026-09-27 13:48 UTCEPSS rescore
  34. 2026-09-27 10:58 UTCGHSA enrichment
  35. 2026-09-27 07:08 UTCGHSA enrichment
  36. 2026-09-27 03:17 UTCGHSA enrichment
  37. 2026-09-26 23:25 UTCEG score recompute
  38. 2026-09-26 23:25 UTCGHSA enrichment
  39. 2026-09-26 22:54 UTCEG score recompute
  40. 2026-09-26 22:54 UTCGHSA enrichment
  41. 2026-09-26 19:24 UTCEG score recompute
  42. 2026-09-26 18:40 UTCEG score recompute
  43. 2026-09-26 18:39 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-82901?
CVE-2026-82901 is a critical vulnerability published on September 26, 2026. The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in the 'uacf7wpcf7mail_components' function in all versions up to, and including, 3.5.50. This makes it possible for unauthenticated attackers to upload arbitrary…
When was CVE-2026-82901 disclosed?
CVE-2026-82901 was first published on September 26, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82901 actively exploited?
CVE-2026-82901 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (64th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82901?
CVE-2026-82901 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82901?
No fix for CVE-2026-82901 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-2026-82901 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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