CVE-2026-62387

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 shipped Access-Control-Allow-Origin: * as its default CORS configuration on all responses, including authenticated endpoints and preflight (OPTIONS) responses. Because the plugin accepts credentials via the Authorization and X-API-Token headers (set programmatically by JavaScript rather than via cookies), an attacker who obtains a valid access token (e.g., via log leakage, Referer headers, browser history, or network capture) can issue fully authenticated cross-origin requests from any malicious website to read sensitive data and perform write operations as the token's user. Fixed in 1.0.0-rc.16.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
—
EPSS
17.5%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 17, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav < 1.0.0-rc.16 CORS Misconfiguration via API Plugin | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-rc-16-cors-misconfiguration-via-api-plugin
github Patch Available🟡 PoC Available

CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2

Vendor Advisories for CVE-2026-62387(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 17× in last 7d / 17× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 13:57 UTCEG score recompute
  9. 2026-07-18 13:57 UTCGHSA enrichment
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-17 14:02 UTCEG score recompute
  12. 2026-07-17 14:02 UTCGHSA enrichment
  13. 2026-07-17 12:36 UTCEG score recompute
  14. 2026-07-17 12:36 UTCGHSA enrichment
  15. 2026-07-17 06:53 UTCGHSA enrichment
  16. 2026-07-17 00:24 UTCEG score recompute
  17. 2026-07-17 00:22 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62387?
CVE-2026-62387 is a high vulnerability published on July 17, 2026. The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 shipped Access-Control-Allow-Origin: * as its default CORS configuration on all responses, including authenticated endpoints and preflight (OPTIONS) responses. Because the plugin accepts credentials via the Authorization and…
When was CVE-2026-62387 disclosed?
CVE-2026-62387 was first published in the National Vulnerability Database on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62387 actively exploited?
CVE-2026-62387 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-62387?
CVE-2026-62387 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-62387?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62387, 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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