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PatchSiren cyber security CVE debrief

CVE-2026-0650 OpenFlagr CVE debrief

CVE-2026-0650 is an authentication bypass vulnerability in OpenFlagr versions prior to and including 1.1.18. The vulnerability allows crafted requests to bypass authentication and access protected API endpoints without valid credentials. This may allow modification of feature flags and export of sensitive data. Affected users should apply patches and review their inventory.

Vendor
OpenFlagr
Product
Flagr
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-07
Original CVE updated
2026-07-14
Advisory published
2026-01-07
Advisory updated
2026-07-14

Who should care

Users of OpenFlagr versions prior to 1.1.19 should apply the patch to prevent authentication bypass attacks. Security teams should review their inventory of OpenFlagr instances and ensure they are running a patched version. Operators and platform administrators should prioritize patching and monitor for suspicious activity.

Technical summary

The authentication bypass vulnerability in OpenFlagr is due to improper handling of path normalization in the whitelist logic of the HTTP middleware. This allows an attacker to craft requests that can bypass authentication and access protected API endpoints without valid credentials. The vulnerability has a CVSS score of 9.3 and is considered critical. Affected users should apply patches and review their inventory. The CVE record was published on 2026-01-07T12:17:07.727Z and last modified on 2026-07-14T16:16:43.207Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD details. Defenders should verify OpenFlagr version and patch status, and review compensating controls for exposed systems while remediation is scheduled and verified.

Defensive priority

High

Recommended defensive actions

  • Apply the patch to upgrade OpenFlagr to version 1.1.19 or later
  • Review inventory of OpenFlagr instances and ensure they are running a patched version
  • Monitor for suspicious activity on OpenFlagr instances
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-01-07T12:17:07.727Z and last modified on 2026-07-14T16:16:43.207Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD details. Defenders should verify OpenFlagr version and patch status.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-0650 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-0650

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

  • CVE-2026-0650 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0650

    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.