CVE-2026-65325Network attack vector

Cross-origin request exposure via unchecked certificate reuse

Published Jul 29, 2026 · Updated Jul 29, 2026

Improper certificate validation in Apache Traffic Server allows remote attackers to route requests through an origin with a mismatched certificate. When reusing a multiplexed HTTP/2 origin connection, the session-selection path fails to verify that the existing server certificate covers each new request hostname. Affected releases 9.0.0 through 9.2.14 and 10.0.0 through 10.1.3 require a reusable HTTP/2 origin session and hostname mismatch, exposing request data and accepting responses from an unauthenticated origin.

CVSS severity6.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Apache Traffic Server allows remote attackers to route requests through an origin with a mismatched certificate. When reusing a multiplexed HTTP/2 origin connection, the session-selection path fails to verify that the existing server certificate covers each new request hostname. Affected releases 9.0.0 through 9.2.14 and 10.0.0 through 10.1.3 require a reusable HTTP/2 origin session and hostname mismatch, exposing request data and accepting responses from an unauthenticated origin.

The record

CVE
CVE-2026-65325
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
The Apache Software Foundation
Product
Apache Traffic Server
Classifications
CWE-295
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=10.0.0 <=10.1.3
  2. Affected versionversion=9.0.0 <=9.2.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Traffic Serverversion=10.0.0 <=10.1.3; version=9.0.0 <=9.2.14

Published CVSS scores

4.8Apache Software FoundationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
6.3Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

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.

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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-295Improper Certificate Validation

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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