CVE-2025-0752Network attack vector

Access-control bypass and service interruption via unsanitized headers

Published Jan 28, 2025 · Updated Feb 24, 2026

HTTP request smuggling in Red Hat OpenShift Service Mesh 2.5.6 and 2.6.3 allows remote authenticated users to bypass request controls. Envoy fails to sanitize attacker-supplied HTTP headers before using them in trust-based request handling, so injected values influence rate limits and access decisions. A valid low-privilege context is required; successful requests enable unauthorized access, replay, request amplification, or service interruption through CPU and memory exhaustion.

CVSS severity7.1
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in Red Hat OpenShift Service Mesh 2.5.6 and 2.6.3 allows remote authenticated users to bypass request controls. Envoy fails to sanitize attacker-supplied HTTP headers before using them in trust-based request handling, so injected values influence rate limits and access decisions. A valid low-privilege context is required; successful requests enable unauthorized access, replay, request amplification, or service interruption through CPU and memory exhaustion.

The record

CVE
CVE-2025-0752
Published
Jan 28, 2025
Updated
Feb 24, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift Service Mesh 2
Classifications
CWE-444, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 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=2.5.6
  2. Affected versionversion=2.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift Service Mesh 2version=2.5.6; version=2.6.3

Published CVSS scores

7.1Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1499Endpoint Denial of Service

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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