CVE-2026-85087Network attack vectorHinoki check available

Client-certificate address-check bypass via no-op matcher

Published Oct 2, 2026 · Updated Oct 2, 2026

Improper certificate validation in Apache Thrift Python bindings before 0.25.0 allows remote attackers to bypass client-address checks over TLS. On Python 3.12 and later, the default TSSLServerSocket validation callback returns success instead of comparing the presented certificate with the connecting peer's address. Exploitation requires a server that requests client certificates and a certificate trusted by that server; certificate-chain validation still applies.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper certificate validation in Apache Thrift Python bindings before 0.25.0 allows remote attackers to bypass client-address checks over TLS. On Python 3.12 and later, the default TSSLServerSocket validation callback returns success instead of comparing the presented certificate with the connecting peer's address. Exploitation requires a server that requests client certificates and a certificate trusted by that server; certificate-chain validation still applies.

The record

CVE
CVE-2026-85087
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
The Apache Software Foundation
Product
Apache Thrift
Classifications
CWE-295, CWE-393
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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 <0.25.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Thriftversion=0 <0.25.0

Published CVSS scores

6.9Apache Software FoundationCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-393Return of Wrong Status Code

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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