CVE-2026-90769

HIGHPre-NVD 7.77.7—
EchelonGraph scoreHIGH confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-13. a secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: Elevated riskExposed: 0

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

Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata, internal network services, and localhost-bound services through the application server's direct HTTP requests.

CVSS v3
7.7
EG Score
7.7(high)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 14, 2026

Advisory Details (5)

Auto-updated Sep 13, 2026
Patch available. Sources: github_commit.
generic

Open Notebook before 1.11.0 Server-Side Request Forgery via link-source | Advisories | VulnCheck

https://www.vulncheck.com/advisories/open-notebook-before-1.11.0-server-side-request-forgery-via-link-source
github_commit Patch Available

commit 9045ea501969 (lfnovo/open-notebook)

Patch available: lfnovo/open-notebook v1.11.0 (contains commit 9045ea501969)

https://github.com/lfnovo/open-notebook/commit/9045ea50196927eac7de647bb5b7009349236fb4
generic

open-notebook/api/routers/sources.py at 8889087e317177d7b6e286342ab34e0c9c01d43e · lfnovo/open-notebook · GitHub

https://github.com/lfnovo/open-notebook/blob/8889087e317177d7b6e286342ab34e0c9c01d43e/api/routers/sources.py
generic

GitHub - lfnovo/open-notebook: An Open Source implementation of Notebook LM with more flexibility and features · GitHub

https://github.com/lfnovo/open-notebook
generic

[Bug]: Server-Side Request Forgery in URL-based source ingestion allows reading internal network and cloud metadata content · Issue #1284 · lfnovo/open-notebook · GitHub

https://github.com/lfnovo/open-notebook/issues/1284

Vendor Advisories for CVE-2026-90769(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 35× 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. 2026-09-21 07:22 UTCEG score recompute
  2. 2026-09-21 07:22 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 19:05 UTCGHSA enrichment
  5. 2026-09-20 07:09 UTCGHSA enrichment
  6. 2026-09-19 19:15 UTCEG score recompute
  7. 2026-09-19 19:14 UTCGHSA enrichment
  8. 2026-09-19 07:18 UTCEG score recompute
  9. 2026-09-19 07:18 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 19:24 UTCGHSA enrichment
  12. 2026-09-18 07:29 UTCGHSA enrichment
  13. 2026-09-17 19:35 UTCEG score recompute
  14. 2026-09-17 19:35 UTCGHSA enrichment
  15. 2026-09-17 19:32 UTCEPSS rescore
  16. 2026-09-17 05:56 UTCGHSA enrichment
  17. 2026-09-16 17:58 UTCEG score recompute
  18. 2026-09-16 17:58 UTCGHSA enrichment
  19. 2026-09-16 14:09 UTCEPSS rescore
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-16 04:23 UTCGHSA enrichment
  22. 2026-09-15 16:17 UTCGHSA enrichment
  23. 2026-09-15 04:22 UTCEG score recompute
  24. 2026-09-15 04:22 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 10 more
  1. 2026-09-14 16:26 UTCEG score recompute
  2. 2026-09-14 16:26 UTCGHSA enrichment
  3. 2026-09-14 15:45 UTCEG score recompute
  4. 2026-09-14 15:45 UTCGHSA enrichment
  5. 2026-09-14 11:09 UTCGHSA enrichment
  6. 2026-09-13 23:15 UTCEG score recompute
  7. 2026-09-13 23:15 UTCGHSA enrichment
  8. 2026-09-13 11:21 UTCEG score recompute
  9. 2026-09-13 10:50 UTCEG score recompute
  10. 2026-09-13 10:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90769?
CVE-2026-90769 is a high vulnerability published on September 13, 2026. Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata, internal network services, and localhost-bound services…
When was CVE-2026-90769 disclosed?
CVE-2026-90769 was first published in the National Vulnerability Database on September 13, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90769 actively exploited?
CVE-2026-90769 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 82.3% of all scored CVEs.
What is the CVSS score of CVE-2026-90769?
CVE-2026-90769 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-90769?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90769, 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

Explore the affected products and dependency analysis for CVE-2026-90769

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