Nixpkgs is a collection of software packages that can be installed with the Nix package manager. Prior to the 25.11 and 26.05 channel fixes, the NixOS module for MySQL services.mysql initializes the MySQL database in a way that allows local users, such as unprivileged web or CGI processes on the same host, to log in as the root user without a password when the service is used with mysql or percona-server. This issue is fixed in the 25.11 and 26.05.
CVE-2026-61828
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (4th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-44690 (ENISA EUVD)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
The CVE record names the fixed release — apply it.
- CVSS v3
- 8.5
- EG Score
- 8.5HIGHmedium confidence
- EG Risk
- 38EG Risk 38/100
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)Severity85% × 45%Impact severity (EG Severity): CVSS 8.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.1% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (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: The CVE record names the fixed release. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 4th
- 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 (8.5): severity, escalated by confirmed exploitation. This CVE's 8.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
The CVE record names the fixed release. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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
July 15, 2026
Last Modified
October 24, 2026
Advisory Details (7)
Auto-updated Jul 15, 2026`services.mysql` is configured with insecure authentication by default when used with `mysql` or `percona-server` · Advisory · NixOS/nixpkgs · GitHub
https://github.com/NixOS/nixpkgs/security/advisories/GHSA-6qxx-6rg8-c4p8[Backport release-25.11] nixos/mysql: fix default MySQL/Percona Server insecure authentication
Fix merged in NixOS/nixpkgs PR #534484 on 2026-06-23 — awaiting tagged release
https://github.com/NixOS/nixpkgs/pull/534484[Backport release-26.05] nixos/mysql: fix default MySQL/Percona Server insecure authentication
Fix merged in NixOS/nixpkgs PR #534482 on 2026-06-23 — awaiting tagged release
https://github.com/NixOS/nixpkgs/pull/534482nixos/mysql: fix default MySQL/Percona Server insecure authentication
Fix merged in NixOS/nixpkgs PR #534254 on 2026-06-22 — awaiting tagged release
https://github.com/NixOS/nixpkgs/pull/534254commit f8ee41468a7a (NixOS/nixpkgs)
Fix landed in NixOS/nixpkgs commit f8ee41468a7a — awaiting tagged release
https://github.com/NixOS/nixpkgs/commit/f8ee41468a7a8f9ed3a8cc7d017151c2ca6f90b5commit 4aed47116a87 (NixOS/nixpkgs)
Fix landed in NixOS/nixpkgs commit 4aed47116a87 — awaiting tagged release
https://github.com/NixOS/nixpkgs/commit/4aed47116a8734922763cd8f477467b0a0bcd6d7commit 3f68d7ad2a68 (NixOS/nixpkgs)
Fix landed in NixOS/nixpkgs commit 3f68d7ad2a68 — awaiting tagged release
https://github.com/NixOS/nixpkgs/commit/3f68d7ad2a6865ff8b4910d89f173d7258bad8ddWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 37× 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 141 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 41 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-10-27 21:04 UTCEG score recompute
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-10-20 20:33 UTCEG score recompute
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-10-18 03:25 UTCEG score recompute
- 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
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- 2026-10-12 15:50 UTCEG score recompute
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- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
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- 2026-10-01 12:41 UTCEG score recompute
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 3rd percentile
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- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-08-28 01:52 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 4th percentile
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- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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Frequently asked(5)
What is CVE-2026-61828?
When was the CVE record for CVE-2026-61828 published?
Is CVE-2026-61828 actively exploited?
What is the CVSS score of CVE-2026-61828?
How do I remediate CVE-2026-61828?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-61828
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