CVE-2026-41081Network attack vector

Unauthenticated access via anonymous TLS principal

Published Apr 27, 2026 · Updated Apr 27, 2026

Authentication bypass in Apache Storm Client before 2.8.7 allows remote attackers to access Storm services through a fallback principal. TlsTransportPlugin catches and suppresses SSLPeerUnverifiedException, then assigns CN=ANONYMOUS instead of rejecting a TLS peer whose certificate is absent or unverifiable. Exploitation requires TLS with client authentication disabled and an authorizer that does not deny CN=ANONYMOUS; the resulting access is limited by that principal's ACLs.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Apache Storm Client before 2.8.7 allows remote attackers to access Storm services through a fallback principal. TlsTransportPlugin catches and suppresses SSLPeerUnverifiedException, then assigns CN=ANONYMOUS instead of rejecting a TLS peer whose certificate is absent or unverifiable. Exploitation requires TLS with client authentication disabled and an authorizer that does not deny CN=ANONYMOUS; the resulting access is limited by that principal's ACLs.

The record

CVE
CVE-2026-41081
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
The Apache Software Foundation
Product
Apache Storm Client
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 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=0 <2.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Storm Clientversion=0 <2.8.7

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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