CVE-2026-87016

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. 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: epss, secondary
Elevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.41 until 0.11.1, get_user_by_oauth_sub and get_user_by_scim_external_id in backend/open_webui/models/users.py used JSON contains matching that compiled to SQL LIKE substring matching on SQLite. An OAuth subject containing percent or underscore wildcard characters could resolve to a different stored identity, potentially selecting an administrator account and issuing the attacker that account's session; PostgreSQL deployments were not affected. This issue is fixed in version 0.11.1.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: Track*

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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 15, 2026

Advisory Details (4)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v0.11.1

Patch available: open-webui/open-webui v0.11.1

https://github.com/open-webui/open-webui/releases/tag/v0.11.1
github_commit

commit 73c1f5806aeb (open-webui/open-webui)

Fix landed in open-webui/open-webui commit 73c1f5806aeb — awaiting tagged release

https://github.com/open-webui/open-webui/commit/73c1f5806aeb6345dad5de8f5aa26d1f3d0bef80
github_pr

refactor: match provider identity lookups via JSON subscript

Fix merged in open-webui/open-webui PR #28624 on 2026-08-17 — awaiting tagged release

https://github.com/open-webui/open-webui/pull/28624
github Patch Available🟡 PoC Available

Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite · Advisory · open-webui/open-webui · GitHub

Affected: 0.11.1 by

https://github.com/open-webui/open-webui/security/advisories/GHSA-wpmr-8h3q-fwj7

Vendor Advisories for CVE-2026-87016(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
open-webui0.10.0 ... 0.9.6 (30 versions)0.11.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

  1. 2026-09-18 22:57 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 20:34 UTCEG score recompute
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 18:11 UTCEG score recompute
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 03:42 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-14 14:30 UTCEG score recompute
  12. 2026-09-14 13:50 UTCEG score recompute
  13. 2026-09-13 22:09 UTCEG score recompute
  14. 2026-09-12 19:46 UTCEG score recompute
  15. 2026-09-11 17:23 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-09 22:31 UTCEG score recompute
  19. 2026-09-09 21:31 UTCEG score recompute
  20. 2026-09-09 21:30 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87016?
CVE-2026-87016 is a high vulnerability published on September 9, 2026. Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.41 until 0.11.1, getuserbyoauthsub and getuserbyscimexternalid in backend/openwebui/models/users.py used JSON contains matching that compiled to SQL LIKE substring matching on SQLite. An OAuth subject…
When was CVE-2026-87016 disclosed?
CVE-2026-87016 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87016 actively exploited?
CVE-2026-87016 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.3% of all scored CVEs.
What is the CVSS score of CVE-2026-87016?
CVE-2026-87016 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-87016?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87016, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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