CVE-2025-0752 | Envoyproxy: openshift service mesh envoy http header sanitization bypass leading to dos and unauthorized access

A flaw was found in OpenShift Service Mesh 2.6.3 and 2.5.6. Rate-limiter avoidance, access-control bypass, CPU and memory exhaustion, and replay attacks may be possible due to improper HTTP header sanitization in Envoy.

Published: 2025-01-28 Last update: 2026-02-19 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-0752 is rated Moderate Risk (43.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.21%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-0752

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-08 0.14% 0.21% +0.07%
2 2026-03-07 0.26% 0.14% -0.11%
3 2026-02-20 — 0.26% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-0752

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 4.2 [email protected]

Weakness enumeration for CVE-2025-0752

OS Trackers for CVE-2025-0752

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2025-0752

Affected software / configurations for CVE-2025-0752

Vendor Product Version Raw CPE
redhat openshift_service_mesh 2.5.6 cpe:2.3:a:redhat:openshift_service_mesh:2.5.6:*:*:*:*:*:*:*
redhat openshift_service_mesh 2.6.3 cpe:2.3:a:redhat:openshift_service_mesh:2.6.3:*:*:*:*:*:*:*

References for CVE-2025-0752

cvelogic Threat Intelligence