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CVE-2026-66058 frappe CVE debrief

CVE-2026-66058 is a vulnerability in the Frappe web application framework that allows unrestricted access to a Document Follow API for authenticated users. This issue was fixed in versions 16.20.0 and 15.112.0. The vulnerability has a medium severity and could allow potential unauthorized access to sensitive documents. Defenders should assess exposure and apply patches to prevent potential misuse of the Document Follow API. The CVE record and NVD entry provide details on the vulnerability and its fix.

Vendor
frappe
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-07
Original CVE updated
2026-09-08
Advisory published
2026-08-07
Advisory updated
2026-09-08

Who should care

Defenders responsible for Frappe deployments should assess exposure and apply patches to prevent potential misuse of the Document Follow API.

Why it matters

CVE-2026-66058 is a medium-severity vulnerability in the Frappe framework that allows authenticated users to access the Document Follow API without restrictions. Defenders should prioritize verifying exposure, applying patches, and monitoring for potential misuse.

  • Potential unauthorized access to sensitive documents
  • Need for verification of Frappe version and exposure
  • Priority for patching and restricting API access
  • Monitoring for potential misuse of the API

Technical summary

The vulnerability allows unrestricted access to a Document Follow API (update_follow) for an authenticated user in Frappe versions prior to 16.20.0 and 15.112.0. This issue has a medium severity and could allow potential unauthorized access to sensitive documents. Defenders should prioritize verifying exposure and applying patches for Frappe versions prior to 16.20.0 and 15.112.0.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Frappe versions prior to 16.20.0 and 15.112.0.

Recommended defensive actions

  • Verify Frappe version and apply patches if necessary
  • Review and restrict access to Document Follow API
  • Monitor for potential misuse of the API

Evidence notes

The CVE record and NVD entry provide details on the vulnerability and its fix. However, additional information on exploitation or impact is limited. Defenders should verify Frappe version and exposure, review and restrict access to Document Follow API, and monitor for potential misuse of the API. The vulnerability allows unrestricted access to a Document Follow API (update_follow) for an authenticated user in Frappe versions prior to 16.20.0 and 15.112.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66058 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66058

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-66058 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66058

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.