CVE-2026-94276Network attack vectorHinoki check available

Cross-issuer access via unchecked introspection issuer

Published Oct 1, 2026 · Updated Oct 1, 2026

Authentication bypass in Apache APISIX 3.12.0 through 3.18.0 allows remote authenticated users to access routes restricted to another issuer. The openid-connect plugin's remote-introspection path accepts an active token without comparing the response's iss value with claim_validator.issuer.valid_issuers. Exploitation requires a route with that issuer allowlist and an authorization server serving multiple issuers; access is limited to routes guarded by the misapplied restriction.

CVSS severityUnavailable
Unscored
EPSS probability0.49%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Apache APISIX 3.12.0 through 3.18.0 allows remote authenticated users to access routes restricted to another issuer. The openid-connect plugin's remote-introspection path accepts an active token without comparing the response's iss value with claim_validator.issuer.valid_issuers. Exploitation requires a route with that issuer allowlist and an authorization server serving multiple issuers; access is limited to routes guarded by the misapplied restriction.

The record

CVE
CVE-2026-94276
Published
Oct 1, 2026
Updated
Oct 1, 2026
Vendor
The Apache Software Foundation
Product
Apache APISIX
Classifications
T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.12.0 <=3.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache APISIXversion=3.12.0 <=3.18.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

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