CVE-2026-58656

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-08. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token from access logs, proxy logs, browser history, or Referrer headers can create persistent backdoor super-admin accounts and exfiltrate sensitive configuration and user data.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
19.0%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav API Plugin - Cross-Origin Admin Account Takeover via CORS Wildcard and JWT Query Parameter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-api-plugin-cross-origin-admin-account-takeover-via-cors-wildcard-and-jwt-query-parameter
github Patch Available🟡 PoC Available

Cross-Origin Admin Account Takeover via CORS Wildcard + JWT Query Parameter Leakage · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp

Vendor Advisories for CVE-2026-58656(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 20× 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. 2026-07-11 18:10 UTCEG score recompute
  2. 2026-07-11 18:10 UTCGHSA enrichment
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 07:18 UTCEG score recompute
  6. 2026-07-11 07:18 UTCGHSA enrichment
  7. 2026-07-10 20:26 UTCEG score recompute
  8. 2026-07-10 20:26 UTCGHSA enrichment
  9. 2026-07-10 09:35 UTCEG score recompute
  10. 2026-07-10 09:34 UTCGHSA enrichment
  11. 2026-07-09 22:42 UTCEG score recompute
  12. 2026-07-09 22:42 UTCGHSA enrichment
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 11:50 UTCEG score recompute
  16. 2026-07-09 11:50 UTCGHSA enrichment
  17. 2026-07-09 00:58 UTCEG score recompute
  18. 2026-07-09 00:58 UTCGHSA enrichment
  19. 2026-07-08 14:06 UTCEG score recompute
  20. 2026-07-08 14:05 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-58656?
CVE-2026-58656 is a high vulnerability published on July 8, 2026. Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token…
When was CVE-2026-58656 disclosed?
CVE-2026-58656 was first published in the National Vulnerability Database on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58656 actively exploited?
CVE-2026-58656 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58656?
CVE-2026-58656 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-58656?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58656, 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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