Is CVE-2026-58656 in the CISA KEV catalog?

No. CVE-2026-58656 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-58656?

CVE-2026-58656 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-58656?

CVE-2026-58656 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-58656?

No published fix for CVE-2026-58656 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-58656

HIGH

7.5

CVSS v3

NVD

Description

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.

CWE-598

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-598 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-3943	Medium	4.1	7.4%	-	-
CVE-2017-3185	Critical	9.8	3.2%	-	-
CVE-2018-14822	Critical	9.8	2.9%	-	-
CVE-2018-5467	Medium	6.5	1.3%	-	-
CVE-2023-6014	Critical	9.8	1.2%	-	-
CVE-2017-9280	Medium	4.3	1.1%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-08.