CVE-2026-65635

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.3 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). 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: cna:eef, epss
Elevated
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Improper Isolation or Compartmentalization vulnerability in malach-it boruta (Elixir.Boruta.Openid module) allows attackers to register OpenID Connect clients with administrative privileges through the dynamic client registration entry point. Boruta.Openid.register_client/3 forwards caller-supplied registration parameters to the administrative client creation path without a public/admin field-level allowlist, so an unauthenticated registrant can set security-sensitive attributes including supported grant types, authorized scopes, PKCE enforcement, public refresh and revocation behavior, token lifetimes, and signing settings. The library does not distinguish between metadata a public registrant is allowed to set and administrative controls that should require operator approval.

This vulnerability is associated with program files lib/boruta/openid.ex and program routines 'Elixir.Boruta.Openid':register_client/3, 'Elixir.Boruta.Openid':parse_registration_params/2.

This issue affects boruta from 2.3.0 before 2.3.7.

CVSS v3
8.3
EG Score
8.3HIGHmedium confidence
EG Risk
53
EG Risk 53/100CISA SSVC

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
Severity83% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 30, 2026

Last Modified

July 31, 2026

Advisory Details (5)

Auto-updated Jul 30, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit

commit 95619a1beaff (malach-it/boruta_auth)

Fix landed in malach-it/boruta_auth commit 95619a1beaff — awaiting tagged release

https://github.com/malach-it/boruta_auth/commit/95619a1beaff68fa766cca9b388e7c780d182525
github_commit

commit 82584c854a33 (malach-it/boruta_auth)

Fix landed in malach-it/boruta_auth commit 82584c854a33 — awaiting tagged release

https://github.com/malach-it/boruta_auth/commit/82584c854a332482232fd25301ab12a835f9f643
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-65635
generic

Boruta dynamic client registration allows creation of over-privileged OAuth clients | Erlang Ecosystem Foundation CNA

https://cna.erlef.org/cves/CVE-2026-65635.html
githubMentions a patch (unverified)🟡 PoC Available

Dynamic registration can create over-privileged clients · Advisory · malach-it/boruta_auth · GitHub

https://github.com/malach-it/boruta_auth/security/advisories/GHSA-w869-fcf2-68vp

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFix by version rangeDependents
boruta2.3.0 ... 2.3.6 (7 versions)
  • 2.3.0 up to 2.3.7: fixed in 2.3.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 41× 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.

Showing the most recent 100 of 121 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2026-65635?
CVE-2026-65635 is a high vulnerability published on July 30, 2026. Improper Isolation or Compartmentalization vulnerability in malach-it boruta (Elixir.Boruta.Openid module) allows attackers to register OpenID Connect clients with administrative privileges through the dynamic client registration entry point. Boruta.Openid.register_client/3 forwards caller-supplied…
When was CVE-2026-65635 disclosed?
CVE-2026-65635 was first published on July 30, 2026, with the most recent update on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65635 actively exploited?
CVE-2026-65635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65635?
CVE-2026-65635 has a CVSS base score of 8.3 (the CNA's own assessment, by eef; NVD's own analysis pending).
How do I remediate CVE-2026-65635?
A fix for CVE-2026-65635 is available: update to the fixed version the vendor names in its advisory.

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