Cyber Resilience

CVE-2026-44087

Medium

Published: 19 June 2026

Published
19 June 2026
Modified
23 June 2026
KEV Added
—
Patch
—
CVSS Score v4 5.3 CVSS:4.0/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
EPSS Score 0.0021 11.6th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-44087 is a medium-severity Insufficient Verification of Data Authenticity (CWE-345) vulnerability in Apache Apisix. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Subvert Trust Controls (T1553); ranked at the 11.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Insufficient Verification of Data Authenticity vulnerability in Apache APISIX. The openid-connect plugin under default configuration has an attack surface that allows the attacker to spoof identity headers allowing the attacker to get unauthorized access the protected resources. This issue affects…

more

Apache APISIX: from 2.3 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

CWE(s)
CWE-345

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1553 Subvert Trust Controls Defense Impairment
Adversaries may undermine security controls that will either warn users of untrusted activity or prevent execution of untrusted programs.
attack.mitre.org →
T1606 Forge Web Credentials Credential Access
Adversaries may forge credential materials that can be used to gain access to web applications or Internet services.
attack.mitre.org →
Why these techniques?

Insufficient authenticity verification in OIDC plugin directly enables spoofing of identity data (headers/tokens), facilitating subverting trust controls and forging web credentials for unauthorized access.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

apache
apisix
2.3 — 3.17.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

PT-8 Computer Matching Requirements
addresses: CWE-345

Directly requires independent verification of matching output before adverse decisions, mitigating insufficient authenticity checks on data from external sources.

SC-17 Public Key Infrastructure Certificates
addresses: CWE-345

Use of approved PKI certificates provides verifiable data authenticity and origin for communications and artifacts.

SC-20 Secure Name/Address Resolution Service (Authoritative Source)
addresses: CWE-345

Mandates provision of authenticity and integrity artifacts that enable verification of name/address resolution data.

SC-21 Secure Name/Address Resolution Service (Recursive or Caching Resolver)
addresses: CWE-345

Requires explicit verification of data authenticity from authoritative sources, preventing acceptance of unauthenticated resolution responses.

SC-33 Transmission Preparation Integrity
addresses: CWE-345

Control requires verification of data authenticity/integrity (e.g., checksums) after aggregation/packing, directly reducing exploitation of insufficient verification before transmission.

SC-45 System Time Synchronization
addresses: CWE-345

Time synchronization supports reliable freshness verification when checking data authenticity across systems or components.

SI-7 Software, Firmware, and Information Integrity
addresses: CWE-345

Mandates verification of data authenticity for software, firmware, and information.

SR-4 Provenance
addresses: CWE-345

Provenance documentation and monitoring directly enables verification of authenticity for components and data throughout their history.

References