CVE-2026-70665

MEDIUMPre-NVD 4.24.2
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (16th 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
4.2EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration (DCR) endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certain conditions, this allows a self-registered client to obtain scopes beyond what the server intended to grant. In DynamicClientRegistrationController#application_params, the scopes attribute is assigned directly from params[:scope] with no validation against Doorkeeper.configuration.scopes or optional_scopes. Combined with enforce_configured_scopes being off by default and Doorkeeper's ScopeChecker prioritizing application-level scopes over server-level scopes, this creates a privilege escalation path. This issue is fixed in version 1.10.4.

CVSS v3
4.2
EG Score
4.2MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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)
Severity42% × 45%
The EG Score, 4.2 of 10.
Exploitation0.3% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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 25, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
Patch available. Sources: github, github_commit.
GitHub commit Patch Available

commit 24c3cb1729b6 (doorkeeper-gem/doorkeeper-openid_connect)

Patch available: doorkeeper-gem/doorkeeper-openid_connect v1.10.4 (contains commit 24c3cb1729b6)

https://github.com/doorkeeper-gem/doorkeeper-openid_connect/commit/24c3cb1729b69f48649a6f4491dcae69f805000d
GitHub advisoryMentions a patch (unverified)

DCR endpoint persists unvalidated client-supplied scopes · Advisory · doorkeeper-gem/doorkeeper-openid_connect · GitHub

https://github.com/doorkeeper-gem/doorkeeper-openid_connect/security/advisories/GHSA-8r7r-wh7x-27ff

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-doorkeeper-openid-connect1.10.1-1 ... 1.9.0-1 (9 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-doorkeeper-openid-connect1.10.1-1 ... 1.9.0-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-doorkeeper-openid-connect1.10.1-1, 1.8.11-1, 1.8.11-2, 1.8.7-1, 1.9.0-1
  • every version up to 1.10.5-1: fixed in 1.10.5-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× 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.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-10-12 15:43 UTCEG score recompute
  4. 2026-10-11 19:29 UTCEG score recompute
  5. 2026-10-11 16:44 UTCEG score recompute
  6. 2026-10-11 14:04 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-10 11:09 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-10-09 03:41 UTCEG score recompute
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-08 02:17 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-07 02:12 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  17. 2026-10-06 03:04 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  19. 2026-10-05 03:57 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  21. 2026-10-04 04:41 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  23. 2026-10-03 05:32 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  25. 2026-10-02 06:24 UTCEG score recompute
Show 62 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  2. 2026-10-01 05:34 UTCEG score recompute
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  4. 2026-09-30 06:21 UTCEG score recompute
  5. 2026-09-28 21:24 UTCEG score recompute
  6. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  7. 2026-09-27 20:40 UTCEG score recompute
  8. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  9. 2026-09-26 21:32 UTCEG score recompute
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  11. 2026-09-25 07:37 UTCEG score recompute
  12. 2026-09-24 08:29 UTCEG score recompute
  13. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-09-23 09:22 UTCEG score recompute
  15. 2026-09-22 10:14 UTCEG score recompute
  16. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-09-21 11:06 UTCEG score recompute
  18. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-20 11:58 UTCEG score recompute
  20. 2026-09-19 12:50 UTCEG score recompute
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-18 13:42 UTCEG score recompute
  23. 2026-09-16 15:09 UTCEG score recompute
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  26. 2026-09-15 16:01 UTCEG score recompute
  27. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  28. 2026-09-13 17:45 UTCEG score recompute
  29. 2026-09-12 18:37 UTCEG score recompute
  30. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  31. 2026-09-11 19:29 UTCEG score recompute
  32. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-09-10 20:21 UTCEG score recompute
  34. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  35. 2026-09-09 06:47 UTCEG score recompute
  36. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  37. 2026-09-08 07:39 UTCEG score recompute
  38. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  39. 2026-09-07 08:30 UTCEG score recompute
  40. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  41. 2026-09-06 09:18 UTCEG score recompute
  42. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  43. 2026-09-05 10:11 UTCEG score recompute
  44. 2026-09-04 11:02 UTCEG score recompute
  45. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  46. 2026-09-03 11:52 UTCEG score recompute
  47. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  48. 2026-09-01 13:28 UTCEG score recompute
  49. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  50. 2026-08-31 14:21 UTCEG score recompute
  51. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  52. 2026-08-30 15:10 UTCEG score recompute
  53. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-08-29 16:01 UTCEG score recompute
  55. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  56. 2026-08-27 17:32 UTCEG score recompute
  57. 2026-08-27 17:10 UTCEG score recompute
  58. 2026-08-26 22:38 UTCEG score recompute
  59. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  60. 2026-08-25 23:31 UTCEG score recompute
  61. 2026-08-25 22:25 UTCEG score recomputeFirst assessed: 4.2 MEDIUM
  62. 2026-08-25 22:24 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Same product

2 shown

Debian:12:ruby-doorkeeper-openid-connect

Frequently asked(5)

What is CVE-2026-70665?
CVE-2026-70665 is a medium-severity vulnerability; its CVE record was published on August 25, 2026. Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration (DCR) endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under…
When was the CVE record for CVE-2026-70665 published?
The CVE record for CVE-2026-70665 was published on August 25, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-70665 actively exploited?
CVE-2026-70665 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70665?
CVE-2026-70665 has a CVSS base score of 4.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70665?
A fix for CVE-2026-70665 is available: update to the fixed version the vendor names in its advisory.

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