How severe is CVE-2026-39374?

CVE-2026-39374 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-39374 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39374?

CVE-2026-39374 affects Plane. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39374?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-39374 have an EU (EUVD) identifier?

Yes. CVE-2026-39374 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19913.

When was CVE-2026-39374 published?

CVE-2026-39374 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-39374

CVE-2026-39374 is a medium-severity vulnerability in Plane with a CVSS 3.x base score of 6.5. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19913
Weakness: CWE-639
Affected product: Plane
Published: 2026-04-07
Last modified: 2026-06-17

Description

Plane is an an open-source project management tool. Prior to 1.3.0, the IssueBulkUpdateDateEndpoint allows a project member (ADMIN or MEMBER) to modify the start_date and target_date of ANY issue across the entire Plane instance, regardless of workspace or project membership. The endpoint fetches issues by ID without filtering by workspace or project, enabling cross-boundary data modification. This vulnerability is fixed in 1.3.0.

Frequently asked questions

What is CVE-2026-39374?: Plane is an an open-source project management tool. Prior to 1.3.0, the IssueBulkUpdateDateEndpoint allows a project member (ADMIN or MEMBER) to modify the start_date and target_date of ANY issue across the entire Plane instance, regardless of workspace or project membership. The endpoint fetches issues by ID without filtering by workspace or project, enabling cross-boundary data modification. This vulnerability is fixed in 1.3.0.
How severe is CVE-2026-39374?: CVE-2026-39374 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-39374 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39374?: CVE-2026-39374 affects Plane. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39374?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39374 have an EU (EUVD) identifier?: Yes. CVE-2026-39374 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19913.
When was CVE-2026-39374 published?: CVE-2026-39374 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/makeplane/plane/security/advisories/GHSA-4q54-h4x9-m329

Affected products (1)

cpe:2.3:a:plane:plane:*:*:*:*:*:*:*:*

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