CVE-2026-73666

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (50th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.2Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

OpenChoreo is a developer platform for Kubernetes. Prior to 1.0.4, 1.1.4, and 1.2.1, the OpenChoreo Backstage backend hardcoded backend.auth.dangerouslyDisableDefaultAuthPolicy and auth.providers.guest.dangerouslyAllowOutsideDevelopment to true, exposing /api/* without authentication and allowing unauthenticated catalog reads, scaffolder log reads, and catalog location creation or deletion. This issue is fixed in versions 1.0.4, 1.1.4, and 1.2.1.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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 (value × EchelonGraph’s weight)
Severity82% × 45%
The EG Score, 8.2 of 10.
Exploitation0.7% × 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 partial (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

The CVE record names the fixed release. 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 partial (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; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

August 13, 2026

Last Modified

September 8, 2026

Advisory Details (8)

Auto-updated Aug 13, 2026
Fix named in the CVE record. Sources: github_commit, github_pr.
GitHub pull request

backport: fix: enable dangerous auth flags only in guest mode - #712

Fix merged in openchoreo/backstage-plugins PR #716 on 2026-07-30 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/pull/716
GitHub pull request

backport: fix: enable dangerous auth flags only in guest mode

Fix merged in openchoreo/backstage-plugins PR #713 on 2026-07-30 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/pull/713
GitHub pull request

backport: fix: enable dangerous auth flags only in guest mode

Fix merged in openchoreo/backstage-plugins PR #712 on 2026-07-30 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/pull/712
GitHub pull request

fix: enable dangerous auth flags only in guest mode

Fix merged in openchoreo/backstage-plugins PR #709 on 2026-07-30 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/pull/709
GitHub commit

commit fdaceeb73793 (openchoreo/backstage-plugins)

Fix landed in openchoreo/backstage-plugins commit fdaceeb73793 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/commit/fdaceeb737938e830c48a150d5bec24f5f487e52
GitHub commit

commit f6df89c15834 (openchoreo/backstage-plugins)

Fix landed in openchoreo/backstage-plugins commit f6df89c15834 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/commit/f6df89c15834506902b2f706a9e8fbe1f6ef1474
GitHub commit

commit dfa3fc8bd1ff (openchoreo/backstage-plugins)

Fix landed in openchoreo/backstage-plugins commit dfa3fc8bd1ff — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/commit/dfa3fc8bd1ffef1346442c891e3e3dd54bc26501
GitHub commit

commit 114a21568992 (openchoreo/backstage-plugins)

Fix landed in openchoreo/backstage-plugins commit 114a21568992 — awaiting tagged release

https://github.com/openchoreo/backstage-plugins/commit/114a215689924b917da5fd28c56e679aaccaef07

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× 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 97 of 108 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 11 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
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  1. 2026-09-29 03:24 UTCEG score recompute
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73666?
CVE-2026-73666 is a high-severity vulnerability; its CVE record was published on August 13, 2026. OpenChoreo is a developer platform for Kubernetes. Prior to 1.0.4, 1.1.4, and 1.2.1, the OpenChoreo Backstage backend hardcoded backend.auth.dangerouslyDisableDefaultAuthPolicy and auth.providers.guest.dangerouslyAllowOutsideDevelopment to true, exposing /api/* without authentication and allowing…
When was the CVE record for CVE-2026-73666 published?
The CVE record for CVE-2026-73666 was published on August 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-73666 actively exploited?
CVE-2026-73666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73666?
CVE-2026-73666 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73666?
The CVE record for CVE-2026-73666 names the fix: "This issue is fixed in versions 1.0.4, 1.1.4, and 1.2.1."

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