CVE-2026-85590

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% 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
Trending — 3 sources updated this weekElevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: Elevated riskExposed: 0

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

phpMyFAQ before 4.1.8 contains an authentication bypass vulnerability in its two-factor authentication (TOTP) disable functionality. The removeTwofactorConfig() handler (reachable via POST /api/user/remove-twofactor) verifies only that the user is logged in and that a valid CSRF token is supplied, then disables TOTP without requiring password re-entry or a current TOTP code. The same downgrade is also reachable inline via PUT /api/user/data/update, which accepts a plain twofactor_enabled form field under the same session+CSRF-only guard. An attacker who has hijacked a user's session can silently strip two-factor protection from any account, including administrator accounts, after which password-only authentication succeeds.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 4, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

phpMyFAQ before 4.1.8 Authentication Bypass via Two-Factor Disable | Advisories | VulnCheck

https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.8-authentication-bypass-via-two-factor-disable
github Patch Available🟡 PoC Available

Two-factor authentication can be disabled without re-authentication (session + CSRF token only) · Advisory · thorsten/phpMyFAQ · GitHub

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-h96g-59xp-7r5m

Vendor Advisories for CVE-2026-85590(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 28× in last 7d / 65× 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. 2026-09-19 08:13 UTCGHSA enrichment
  2. 2026-09-18 21:23 UTCEG score recompute
  3. 2026-09-18 21:23 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 09:27 UTCGHSA enrichment
  6. 2026-09-17 22:36 UTCEG score recompute
  7. 2026-09-17 22:36 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 11:38 UTCGHSA enrichment
  10. 2026-09-17 00:48 UTCEG score recompute
  11. 2026-09-17 00:48 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 13:57 UTCEG score recompute
  14. 2026-09-16 13:57 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 03:01 UTCGHSA enrichment
  17. 2026-09-15 16:10 UTCGHSA enrichment
  18. 2026-09-15 05:19 UTCEG score recompute
  19. 2026-09-15 05:18 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 18:22 UTCGHSA enrichment
  23. 2026-09-14 06:32 UTCGHSA enrichment
  24. 2026-09-13 19:41 UTCEG score recompute
  25. 2026-09-13 19:41 UTCGHSA enrichment
Show 40 more
  1. 2026-09-13 08:50 UTCGHSA enrichment
  2. 2026-09-12 21:59 UTCEG score recompute
  3. 2026-09-12 21:59 UTCGHSA enrichment
  4. 2026-09-12 11:08 UTCGHSA enrichment
  5. 2026-09-12 00:17 UTCEG score recompute
  6. 2026-09-12 00:17 UTCGHSA enrichment
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 13:26 UTCEG score recompute
  10. 2026-09-11 13:26 UTCGHSA enrichment
  11. 2026-09-11 02:33 UTCGHSA enrichment
  12. 2026-09-10 15:42 UTCEG score recompute
  13. 2026-09-10 15:42 UTCGHSA enrichment
  14. 2026-09-10 04:51 UTCGHSA enrichment
  15. 2026-09-09 18:00 UTCGHSA enrichment
  16. 2026-09-09 07:09 UTCEG score recompute
  17. 2026-09-09 07:09 UTCGHSA enrichment
  18. 2026-09-08 22:01 UTCEPSS rescore
  19. 2026-09-08 20:18 UTCGHSA enrichment
  20. 2026-09-08 06:15 UTCGHSA enrichment
  21. 2026-09-07 19:24 UTCEG score recompute
  22. 2026-09-07 19:24 UTCGHSA enrichment
  23. 2026-09-07 08:32 UTCGHSA enrichment
  24. 2026-09-06 21:40 UTCEG score recompute
  25. 2026-09-06 21:40 UTCGHSA enrichment
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-06 10:49 UTCGHSA enrichment
  28. 2026-09-05 23:58 UTCEG score recompute
  29. 2026-09-05 23:58 UTCGHSA enrichment
  30. 2026-09-05 15:31 UTCEPSS rescore
  31. 2026-09-05 13:07 UTCGHSA enrichment
  32. 2026-09-05 02:17 UTCEG score recompute
  33. 2026-09-05 02:17 UTCGHSA enrichment
  34. 2026-09-04 15:26 UTCEG score recompute
  35. 2026-09-04 15:26 UTCGHSA enrichment
  36. 2026-09-04 14:25 UTCEG score recompute
  37. 2026-09-04 14:25 UTCGHSA enrichment
  38. 2026-09-04 12:21 UTCEG score recompute
  39. 2026-09-04 11:34 UTCEG score recompute
  40. 2026-09-04 11:33 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-85590?
CVE-2026-85590 is a high vulnerability published on September 4, 2026. phpMyFAQ before 4.1.8 contains an authentication bypass vulnerability in its two-factor authentication (TOTP) disable functionality. The removeTwofactorConfig() handler (reachable via POST /api/user/remove-twofactor) verifies only that the user is logged in and that a valid CSRF token is supplied,…
When was CVE-2026-85590 disclosed?
CVE-2026-85590 was first published in the National Vulnerability Database on September 4, 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-2026-85590 actively exploited?
CVE-2026-85590 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 67.5% of all scored CVEs.
What is the CVSS score of CVE-2026-85590?
CVE-2026-85590 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-85590?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85590, 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

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