Red Hat Security Advisory: Kiali 1.73.33 for Red Hat OpenShift Service Mesh 2.6
Kiali 1.73.33, for Red Hat OpenShift Service Mesh 2.6, provides observability for the service mesh by offering a visual representation of the mesh topology and metrics, helping users monitor, trace, and manage efficiently. Security Fix(es): * CVE-2026-42338 openshift-service-mesh/kiali-ossmc-rhel9: ip-address: Cross-site scripting via improper HTML escaping of untrusted input (OSSM-14066) * CVE-2026-42338 openshift-service-mesh/kiali-rhel9: ip-address: Cross-site scripting via improper HTML escaping of untrusted input (OSSM-14067) * CVE-2026-39821 openshift-service-mesh/kiali-rhel9: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (OSSM-14073) * CVE-2026-44495 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure due to prototype pollution vulnerability (OSSM-14141) * CVE-2026-44495 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure due to prototype pollution vulnerability (OSSM-14142) * CVE-2026-44488 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Denial of Service due to unenforced request and response size limits (OSSM-14152) * CVE-2026-44488 openshift-service-mesh/kiali-rhel9: Axios: Denial of Service due to unenforced request and response size limits (OSSM-14156) * CVE-2026-44487 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure of proxy credentials via redirect flows (OSSM-14168) * CVE-2026-44487 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure of proxy credentials via redirect flows (OSSM-14182) * CVE-2026-44494 openshift-service-mesh/kiali-rhel9: Axios: Man-in-the-Middle (MITM) attack via Prototype Pollution (OSSM-14177) * CVE-2026-44494 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Man-in-the-Middle (MITM) attack via Prototype Pollution (OSSM-14186) * CVE-2026-44496 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Client-side Denial of Service via unescaped regex metacharacters in XSRF cookie name (OSSM-14210) * CVE-2026-44496 openshift-service-mesh/kiali-rhel9: Axios: Client-side Denial of Service via unescaped regex metacharacters in XSRF cookie name (OSSM-14206) * CVE-2026-44486 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure of proxy credentials via HTTP redirects (OSSM-14201) * CVE-2026-44486 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure of proxy credentials via HTTP redirects (OSSM-14187) * CVE-2026-44492 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization (OSSM-14219) * CVE-2026-44492 openshift-service-mesh/kiali-rhel9: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization (OSSM-14224) * CVE-2026-48779 openshift-service-mesh/kiali-rhel9: ws: Denial of Service via memory exhaustion from small WebSocket fragments (OSSM-14305) * CVE-2026-48779 openshift-service-mesh/kiali-ossmc-rhel9: ws: Denial of Service via memory exhaustion from small WebSocket fragments (OSSM-14303) * CVE-2026-12143 openshift-service-mesh/kiali-ossmc-rhel9: form-data: Form field override via CRLF injection (OSSM-14335) * CVE-2026-12143 openshift-service-mesh/kiali-rhel9: form-data: Form field override via CRLF injection (OSSM-14327) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
This advisory covers multiple security flaws in Kiali, a service mesh observability tool used in Red Hat OpenShift Service Mesh. Notably, CVE-2026-12143 is a CRLF injection vulnerability in the form-data library that allows remote attackers to inject carriage return, line feed, or double-quote characters into multipart form-data field names or filenames, enabling header injection or form field overrides. Other vulnerabilities include cross-site scripting via improper HTML escaping (CVE-2026-42338), privilege escalation via incorrect Punycode processing (CVE-2026-39821), prototype pollution leading to information disclosure and man-in-the-middle attacks (CVE-2026-44495, CVE-2026-44494), denial of service via request size limits and WebSocket fragment exhaustion (CVE-2026-44488, CVE-2026-48779), and proxy bypass issues (CVE-2026-44492). Red Hat has released Kiali 1.73.33 for OpenShift Service Mesh 2.6 containing fixes. The CRLF injection vulnerability's practical impact is limited in default deployments but may affect custom integrations that use untrusted input for multipart field names. The advisory recommends strict input validation and upgrading to the fixed version.
Potential Impact
The vulnerabilities collectively allow attackers to perform cross-site scripting, privilege escalation, information disclosure, denial of service, proxy bypass, and form data manipulation via CRLF injection. Specifically, CVE-2026-12143 enables remote attackers to inject arbitrary headers or multipart parts, potentially overriding sensitive form fields and compromising data integrity. However, in default Red Hat OpenShift Service Mesh deployments, the exploit path for this CRLF injection is not reachable due to the use of fixed field names. Other vulnerabilities may allow attackers to disclose sensitive information, escalate privileges, or disrupt service availability. The overall impact is rated as Moderate by Red Hat for the fixed version.
Mitigation Recommendations
Red Hat has released Kiali 1.73.33 for OpenShift Service Mesh 2.6 which addresses these vulnerabilities. Users should upgrade to this fixed version to remediate the issues. For the CRLF injection vulnerability (CVE-2026-12143), applications using the form-data library should implement strict input validation and sanitization on all multipart form-data field names and filenames derived from untrusted sources to prevent injection of control characters. Deployments that use fixed or trusted field names are not impacted by this vulnerability. No additional urgent actions are required if the fixed version is deployed.
Red Hat Security Advisory: Kiali 1.73.33 for Red Hat OpenShift Service Mesh 2.6
Description
Kiali 1.73.33, for Red Hat OpenShift Service Mesh 2.6, provides observability for the service mesh by offering a visual representation of the mesh topology and metrics, helping users monitor, trace, and manage efficiently. Security Fix(es): * CVE-2026-42338 openshift-service-mesh/kiali-ossmc-rhel9: ip-address: Cross-site scripting via improper HTML escaping of untrusted input (OSSM-14066) * CVE-2026-42338 openshift-service-mesh/kiali-rhel9: ip-address: Cross-site scripting via improper HTML escaping of untrusted input (OSSM-14067) * CVE-2026-39821 openshift-service-mesh/kiali-rhel9: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (OSSM-14073) * CVE-2026-44495 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure due to prototype pollution vulnerability (OSSM-14141) * CVE-2026-44495 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure due to prototype pollution vulnerability (OSSM-14142) * CVE-2026-44488 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Denial of Service due to unenforced request and response size limits (OSSM-14152) * CVE-2026-44488 openshift-service-mesh/kiali-rhel9: Axios: Denial of Service due to unenforced request and response size limits (OSSM-14156) * CVE-2026-44487 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure of proxy credentials via redirect flows (OSSM-14168) * CVE-2026-44487 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure of proxy credentials via redirect flows (OSSM-14182) * CVE-2026-44494 openshift-service-mesh/kiali-rhel9: Axios: Man-in-the-Middle (MITM) attack via Prototype Pollution (OSSM-14177) * CVE-2026-44494 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Man-in-the-Middle (MITM) attack via Prototype Pollution (OSSM-14186) * CVE-2026-44496 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Client-side Denial of Service via unescaped regex metacharacters in XSRF cookie name (OSSM-14210) * CVE-2026-44496 openshift-service-mesh/kiali-rhel9: Axios: Client-side Denial of Service via unescaped regex metacharacters in XSRF cookie name (OSSM-14206) * CVE-2026-44486 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Information disclosure of proxy credentials via HTTP redirects (OSSM-14201) * CVE-2026-44486 openshift-service-mesh/kiali-rhel9: Axios: Information disclosure of proxy credentials via HTTP redirects (OSSM-14187) * CVE-2026-44492 openshift-service-mesh/kiali-ossmc-rhel9: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization (OSSM-14219) * CVE-2026-44492 openshift-service-mesh/kiali-rhel9: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization (OSSM-14224) * CVE-2026-48779 openshift-service-mesh/kiali-rhel9: ws: Denial of Service via memory exhaustion from small WebSocket fragments (OSSM-14305) * CVE-2026-48779 openshift-service-mesh/kiali-ossmc-rhel9: ws: Denial of Service via memory exhaustion from small WebSocket fragments (OSSM-14303) * CVE-2026-12143 openshift-service-mesh/kiali-ossmc-rhel9: form-data: Form field override via CRLF injection (OSSM-14335) * CVE-2026-12143 openshift-service-mesh/kiali-rhel9: form-data: Form field override via CRLF injection (OSSM-14327) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers multiple security flaws in Kiali, a service mesh observability tool used in Red Hat OpenShift Service Mesh. Notably, CVE-2026-12143 is a CRLF injection vulnerability in the form-data library that allows remote attackers to inject carriage return, line feed, or double-quote characters into multipart form-data field names or filenames, enabling header injection or form field overrides. Other vulnerabilities include cross-site scripting via improper HTML escaping (CVE-2026-42338), privilege escalation via incorrect Punycode processing (CVE-2026-39821), prototype pollution leading to information disclosure and man-in-the-middle attacks (CVE-2026-44495, CVE-2026-44494), denial of service via request size limits and WebSocket fragment exhaustion (CVE-2026-44488, CVE-2026-48779), and proxy bypass issues (CVE-2026-44492). Red Hat has released Kiali 1.73.33 for OpenShift Service Mesh 2.6 containing fixes. The CRLF injection vulnerability's practical impact is limited in default deployments but may affect custom integrations that use untrusted input for multipart field names. The advisory recommends strict input validation and upgrading to the fixed version.
Potential Impact
The vulnerabilities collectively allow attackers to perform cross-site scripting, privilege escalation, information disclosure, denial of service, proxy bypass, and form data manipulation via CRLF injection. Specifically, CVE-2026-12143 enables remote attackers to inject arbitrary headers or multipart parts, potentially overriding sensitive form fields and compromising data integrity. However, in default Red Hat OpenShift Service Mesh deployments, the exploit path for this CRLF injection is not reachable due to the use of fixed field names. Other vulnerabilities may allow attackers to disclose sensitive information, escalate privileges, or disrupt service availability. The overall impact is rated as Moderate by Red Hat for the fixed version.
Mitigation Recommendations
Red Hat has released Kiali 1.73.33 for OpenShift Service Mesh 2.6 which addresses these vulnerabilities. Users should upgrade to this fixed version to remediate the issues. For the CRLF injection vulnerability (CVE-2026-12143), applications using the form-data library should implement strict input validation and sanitization on all multipart form-data field names and filenames derived from untrusted sources to prevent injection of control characters. Deployments that use fixed or trusted field names are not impacted by this vulnerability. No additional urgent actions are required if the fixed version is deployed.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-12143
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a3c0d23eed863c81e23eb70
Added to database: 06/24/2026, 17:00:19 UTC
Last enriched: 08/07/2026, 03:07:41 UTC
Last updated: 08/13/2026, 19:27:47 UTC
Views: 138
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