How severe is CVE-2026-86120?

CVE-2026-86120 has a CVSS 3.x base score of 4.3, 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 low, and availability none.

Is CVE-2026-86120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-86120?

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

When was CVE-2026-86120 published?

CVE-2026-86120 was published on 2026-09-05 and last updated on 2026-09-23.

CVE-2026-86120

CVE-2026-86120 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-636.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-636
Published: 2026-09-05
Last modified: 2026-09-23

Description

APITable through 1.13.0-beta.1 contains an incorrect authorization vulnerability in NodePermissionGuard that fails to enforce node-level access control when permission lookups throw exceptions. Attackers with valid Fusion API tokens can write attachments to private datasheets they have been explicitly denied access to by exploiting the unhandled exception in the permission guard.

Frequently asked questions

What is CVE-2026-86120?: APITable through 1.13.0-beta.1 contains an incorrect authorization vulnerability in NodePermissionGuard that fails to enforce node-level access control when permission lookups throw exceptions. Attackers with valid Fusion API tokens can write attachments to private datasheets they have been explicitly denied access to by exploiting the unhandled exception in the permission guard.
How severe is CVE-2026-86120?: CVE-2026-86120 has a CVSS 3.x base score of 4.3, 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 low, and availability none.
Is CVE-2026-86120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-86120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-86120 published?: CVE-2026-86120 was published on 2026-09-05 and last updated on 2026-09-23.

References

Other CWE-636 vulnerabilities

CVE-2026-22034 — Critical (CVSS 9.8): Snuffleupagus is a module that raises the cost of attacks against website by killing bug classes and providing a…
CVE-2024-3729 — Critical (CVSS 9.8): The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to improper missing encryption exception handling…
CVE-2026-103510 — Critical (CVSS 9.5): P4 Search prior to 2026.4.2 does not fail securely when its service authentication token is blank. In affected…
CVE-2026-53459 — Critical (CVSS 9.3): Bambuddy is a self-hosted print archive and management system for Bambu Lab 3D printers. Starting in version 0.1.6 and…
CVE-2026-95848 — Critical (CVSS 9.1): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when a configured authenticator or authorizator class…
CVE-2026-40525 — Critical (CVSS 9.1): OpenViking prior to version 0.3.9 contains an authentication bypass vulnerability in the VikingBot OpenAPI HTTP route…

Browse all CWE-636 vulnerabilities →