CVE-2025-58136Network attack vector

Unauthenticated crash via invalid POST write buffer

Published Apr 2, 2026 · Updated Apr 2, 2026

Denial of service in Apache Traffic Server 9.0.0 through 9.2.12 and 10.0.0 through 10.1.1 allows remote attackers to crash the proxy. HttpSM passes a tunnel producer an invalid request-body buffer and writes the buffered POST into it instead of rejecting the state. The path requires proxy.config.http.request_buffer_enabled to be enabled; its default is 0, and successful triggering interrupts the proxy service.

CVSS severity7.5
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Apache Traffic Server 9.0.0 through 9.2.12 and 10.0.0 through 10.1.1 allows remote attackers to crash the proxy. HttpSM passes a tunnel producer an invalid request-body buffer and writes the buffered POST into it instead of rejecting the state. The path requires proxy.config.http.request_buffer_enabled to be enabled; its default is 0, and successful triggering interrupts the proxy service.

The record

CVE
CVE-2025-58136
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
The Apache Software Foundation
Product
Apache Traffic Server
Classifications
CWE-670, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 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=10.0.0 <=10.1.1
  2. Affected versionversion=9.0.0 <=9.2.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Traffic Serverversion=10.0.0 <=10.1.1; version=9.0.0 <=9.2.12

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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

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-670Always-Incorrect Control Flow Implementation
T1499.004Application or System Exploitation

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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