PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-44087 Apache Software Foundation CVE debrief

CVE-2026-44087 is a MEDIUM-severity vulnerability in Apache APISIX's openid-connect plugin. Under default configuration, an attacker can spoof identity headers to access protected resources without authorization. This Insufficient Verification of Data Authenticity issue affects Apache APISIX versions from 2.3 to 3.16.0. Defenders should prioritize upgrading to version 3.17.0, which fixes the issue. The vulnerability has a CVSS score of 5.3 and was published on June 19, 2026.

Vendor
Apache Software Foundation
Product
Apache APISIX
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-19
Original CVE updated
2026-06-23
Advisory published
2026-06-19
Advisory updated
2026-06-23

Who should care

Organizations using Apache APISIX versions between 2.3 and 3.16.0 should prioritize upgrading to version 3.17.0. Specifically, security teams and administrators responsible for API management and authentication should be aware of this vulnerability and take immediate action to mitigate the risk of unauthorized access to protected resources.

Technical summary

The openid-connect plugin in Apache APISIX has an insufficient verification of data authenticity vulnerability. This allows attackers to spoof identity headers, potentially leading to unauthorized access to protected resources. The vulnerability is due to the plugin's default configuration and affects Apache APISIX versions from 2.3 through 3.16.0. The issue is fixed in version 3.17.0. The CVSS:4.0 vector is AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

Defensive priority

Upgrade to version 3.17.0 to fix the vulnerability and prevent unauthorized access.

Recommended defensive actions

  • Upgrade Apache APISIX to version 3.17.0
  • Review and adjust the openid-connect plugin configuration
  • Monitor for suspicious activity related to identity headers
  • Implement compensating controls for authentication and authorization
  • Inventory and track API management systems for compliance

Evidence notes

The primary evidence for this vulnerability comes from the CVE record and the NVD detail page. The vulnerability affects Apache APISIX versions from 2.3 to 3.16.0. Defenders should verify the version of Apache APISIX in use and confirm if it is within the affected range. Official sources, such as the Apache security mailing list and Openwall, provide additional context and references.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44087 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44087

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

  • CVE-2026-44087 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44087

    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.