How severe is CVE-2026-42844?

CVE-2026-42844 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42844 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42844?

CVE-2026-42844 affects Getgrav Grav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42844?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42844 have an EU (EUVD) identifier?

Yes. CVE-2026-42844 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29857.

When was CVE-2026-42844 published?

CVE-2026-42844 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42844

CVE-2026-42844 is a high-severity vulnerability in Getgrav Grav with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29857
Weakness: CWE-269
Affected product: Getgrav Grav
Published: 2026-05-12
Last modified: 2026-06-17

Description

Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.

Frequently asked questions

What is CVE-2026-42844?: Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.
How severe is CVE-2026-42844?: CVE-2026-42844 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42844 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42844?: CVE-2026-42844 affects Getgrav Grav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42844?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42844 have an EU (EUVD) identifier?: Yes. CVE-2026-42844 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29857.
When was CVE-2026-42844 published?: CVE-2026-42844 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h

Affected products (1)

cpe:2.3:a:getgrav:grav:2.0.0:beta2:*:*:*:*:*:*

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