Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.49.1, Nhost automatically links an incoming OAuth identity to an existing Nhost account when the email addresses match. This is only safe when the email has been verified by the OAuth provider. Nhost's controller trusts a profile.EmailVerified boolean that is set by each provider adapter. The vulnerability is that several provider adapters do not correctly populate this field they either silently drop a verified field the provider API actually returns (Discord), or they fall back to accepting unconfirmed emails and marking them as verified (Bitbucket). Two Microsoft providers (AzureAD, EntraID) derive the email from non-ownership-proving fields like the user principal name, then mark it verified. The result is that an attacker can present an email they don't own to Nhost, have the OAuth identity merged into the victim's account, and receive a full authenticated session. This issue has been patched in version 0.49.1.
CVE-2026-41574
“—” beside the score: it is equal to NVD's CVSS score.
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-28650 (ENISA EUVD)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 59EG Risk 59/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.8% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.8%
- EPSS %ILE
- 56th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
May 8, 2026
Last Modified
May 13, 2026
Advisory Details (4)
Auto-updated Oct 8, 2026Account Takeover via OAuth Email Verification Bypass · Advisory · nhost/nhost · GitHub
https://github.com/nhost/nhost/security/advisories/GHSA-6g38-8j4p-j3pr[email protected]
Patch available: nhost/nhost [email protected]
https://github.com/nhost/nhost/releases/tag/auth%400.49.1fix(auth): strict use of email verified with oauth2 providers
Patch available: nhost/nhost @nhost/[email protected] (PR #4162 merged 2026-04-17)
https://github.com/nhost/nhost/pull/4162commit ec8dab3f2cf4 (nhost/nhost)
Patch available: nhost/nhost @nhost/[email protected] (contains commit ec8dab3f2cf4)
https://github.com/nhost/nhost/commit/ec8dab3f2cf46e1131ddaf893d56c37aa00380b2Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| github.com/nhost/nhost | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 15× in last 7d / 52× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 215 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 115 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-30 10:28 UTCEG score recompute
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
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- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.9% · 59th percentile
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- 2026-10-18 03:41 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.9% · 59th percentile
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- 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.9% · 59th percentile
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- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.9% · 59th percentile
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- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
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- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.9% · 58th percentile
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- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-30 07:58 UTCOSV refresh
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.9% · 58th percentile
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- 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
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- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-08-23 19:13 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.8% · 54th percentile
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- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
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- 2026-08-17 11:54 UTCEG score recompute
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- 2026-08-11 01:19 UTCEG score recompute
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
Related CVEs(same product + same CWE)
Same product
3 shownGo:github.com/nhost/nhost
Frequently asked(5)
What is CVE-2026-41574?
When was the CVE record for CVE-2026-41574 published?
Is CVE-2026-41574 actively exploited?
What is the CVSS score of CVE-2026-41574?
How do I remediate CVE-2026-41574?
Dependency Blast Radius
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