CVE-2026-100703

HIGHPre-NVD 7.77.7—
EchelonGraph scoreHIGH confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-26. 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 week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in its policy environment without confining it to the policy's namespace, unlike the sibling libraries (resource.Lib, http.Lib, configMap loader) which are handed the policy namespace. A tenant who can create a namespaced policy (e.g. NamespacedValidatingPolicy, and likewise the namespaced mutating, deleting, generating, and image-validating policy kinds) in their own namespace can call globalContext.get("", "") and receive the full cached contents of a cluster-scoped GlobalContextEntry, including data cached from namespaces the tenant has no RBAC permission to read. No admission validation rejects such calls. Fixed in 1.19.1.

CVSS v3
7.7
EG Score
7.7HIGHhigh confidence
EG Risk
35
EG Risk 35/100CISA 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

CISA SSVCTrack 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). 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

September 26, 2026

Last Modified

September 28, 2026

Advisory Details (2)

Auto-updated Sep 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Kyverno before 1.19.1 Cross-Namespace Data Access via globalcontext.Lib | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kyverno-before-1.19.1-cross-namespace-data-access-via-globalcontext-lib
github Patch Available🟡 PoC Available

globalcontext.Lib is the one CEL library not namespace-confined, letting a tenant-authored NamespacedValidatingPolicy read cross-namespace GlobalContextEntry data · Advisory · kyverno/kyverno · GitHub

https://github.com/kyverno/kyverno/security/advisories/GHSA-59v6-2x73-wfg4

Vendor Advisories for CVE-2026-100703(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 32× in last 7d / 39× 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. 2026-10-04 03:26 UTCGHSA enrichment
  2. 2026-10-03 15:47 UTCEG score recompute
  3. 2026-10-03 15:47 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 04:04 UTCEG score recompute
  6. 2026-10-03 04:04 UTCGHSA enrichment
  7. 2026-10-02 16:24 UTCGHSA enrichment
  8. 2026-10-02 16:23 UTCGHSA enrichment
  9. 2026-10-02 16:22 UTCGHSA enrichment
  10. 2026-10-02 04:42 UTCEG score recompute
  11. 2026-10-02 04:42 UTCGHSA enrichment
  12. 2026-10-01 19:49 UTCEPSS rescore
  13. 2026-10-01 17:00 UTCGHSA enrichment
  14. 2026-10-01 05:10 UTCGHSA enrichment
  15. 2026-09-30 17:31 UTCEG score recompute
  16. 2026-09-30 17:31 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-30 05:52 UTCGHSA enrichment
  19. 2026-09-29 18:12 UTCEG score recompute
  20. 2026-09-29 18:12 UTCGHSA enrichment
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 06:00 UTCEG score recompute
  23. 2026-09-29 06:00 UTCGHSA enrichment
  24. 2026-09-28 18:21 UTCEG score recompute
  25. 2026-09-28 18:21 UTCGHSA enrichment
Show 14 more
  1. 2026-09-28 17:49 UTCEG score recompute
  2. 2026-09-28 17:49 UTCGHSA enrichment
  3. 2026-09-28 15:27 UTCEG score recompute
  4. 2026-09-28 15:27 UTCGHSA enrichment
  5. 2026-09-28 13:50 UTCEPSS rescore
  6. 2026-09-28 13:08 UTCGHSA enrichment
  7. 2026-09-28 01:28 UTCGHSA enrichment
  8. 2026-09-27 13:49 UTCEG score recompute
  9. 2026-09-27 13:49 UTCGHSA enrichment
  10. 2026-09-27 02:09 UTCEG score recompute
  11. 2026-09-27 02:08 UTCGHSA enrichment
  12. 2026-09-26 14:28 UTCEG score recompute
  13. 2026-09-26 13:34 UTCEG score recompute
  14. 2026-09-26 13:30 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100703?
CVE-2026-100703 is a high vulnerability published on September 26, 2026. Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in its policy environment without confining it to the policy's namespace, unlike the sibling libraries (resource.Lib, http.Lib, configMap loader) which are handed the policy namespace. A tenant who can create a namespaced…
When was CVE-2026-100703 disclosed?
CVE-2026-100703 was first published on September 26, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100703 actively exploited?
CVE-2026-100703 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100703?
CVE-2026-100703 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100703?
A fix for CVE-2026-100703 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100703 are linked in the Vendor Advisories panel on this page.

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