CVE-2026-59817

MEDIUM

5.3

CVSS v3

Description

Ghost is a Node.js content management system. From 6.27.0 before 6.44.0, Ghost's public donation checkout flow allowed an unauthenticated attacker to control donation checkout metadata and obtain full paid gift memberships for a minimal payment without exposing customer or member data or stealing money from a site or its members. This issue is fixed in version 6.44.0.

CWE-472 CWE-639Authorization Bypass Through User-Controlled Key

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

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.26%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Other references5

Related Vulnerabilities

Other CWE-472 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2025-6191	High	8.8	9.5%	-	Fix
CVE-2025-7656	High	8.8	9.1%	-	Fix
CVE-2017-5261	High	8.8	8.9%	-	-
CVE-2017-5260	High	8.8	8.1%	-	-
CVE-2025-10891	High	8.8	6.6%	-	Fix

Common questions

How do I fix CVE-2026-59817?

No published fix for CVE-2026-59817 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

Is CVE-2026-59817 being actively exploited?

Not that we know of. CVE-2026-59817 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.26% is the estimated probability that it will be exploited in the next 30 days. That is higher than 17% of all scored CVEs.

How severe is CVE-2026-59817?

CVE-2026-59817 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

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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 2026-07-14.