CVE-2025-26791VulnerabilityPublished 1 Jul 2025Updated 7 Sep 2026

Red Hat Security Advisory: Network Observability 1.9.0 for OpenShift

Affects Red HatSource GCVE Database

Not known to be exploited : upgrade to 2.6.0 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.6.0

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Red Hat to 2.6.0.

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected >=2.5.0 <2.6.0 Red Hat Red Hat Openshift Network Observability Red Hat Openshift Network Observability 1.9.3 amd64 registry.redhat.io/network-observability/network-observability-flowlogs-pipeline-rhel9@sha256:310a5e1e642da059d049f4f728b2713536b870d05cf3c570ea8c539624d635a1_amd64 Red Hat OpenShift Service Mesh RHOSSM 2.5 for RHEL 8 openshift-service-mesh/kiali-ossmc-rhel8@sha256:d5f3ed856b5518dd838382e916efa19b3208dd947d72c5d496e31bdba74c6d9c_amd64 Red Hat Ansible Automation Platform Red Hat Ansible Automation Platform 2.5 for RHEL 8 Red Hat Openshift Network Observability 1.9.1	Fixed in 2.6.0

AI-suggested

Red Hat has published an official security advisory (RHSA-2025:10020) detailing the vulnerability and remediation steps. Users of Red Hat OpenShift Service Mesh versions >=2.5.0 and <2.6.0 should apply the updates provided by Red Hat to address this issue. Refer to Red Hat's official documentation and advisories for instructions on applying the fix. No additional mitigations are specified beyond applying the official update.

Description

Network flows collector and monitoring solution.

Impact

The vulnerability enables attackers to perform mutation-based Cross-site Scripting (mXSS) attacks, potentially leading to unauthorized execution of malicious scripts in the context of affected web applications. This can result in disclosure of sensitive information such as session cookies, unauthorized actions performed on behalf of users, and compromise of user accounts. The impact includes confidentiality and integrity loss, but no direct availability impact. The severity is assessed as medium by Red Hat.

Summary

CVE-2025-26791 is a mutation-based Cross-site Scripting (mXSS) vulnerability in DOMPurify, caused by improper template literal regular expression handling. This vulnerability allows attackers to inject and execute malicious scripts in affected Red Hat OpenShift Service Mesh containers, specifically versions >=2.5.0 and <2.6.0. The issue is tracked under CWE-79 (Improper Neutralization of Input During Web Page Generation). Red Hat has published an advisory (RHSA-2025:10020) describing the vulnerability, its impact, and references to fixes in DOMPurify upstream. The vulnerability can lead to unauthorized code execution, data disclosure, and bypass of protection mechanisms in web applications using the affected component.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Aug 2026, 17:05 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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