Red Hat Openshift Service Mesh vulnerabilities

23 CVEs affecting Red Hat Openshift Service Mesh, 1 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-47774, published 2026-06-17.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2023-44487: HTTP/2 Rapid Reset Attack Vulnerability, published 2023-10-10. High severity, CVSS 7.5. Actively exploited: in CISA KEV since 2023-10-10. EPSS: 100% chance of exploitation in the next 30 days. The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
CVE-2019-9515, published 2019-08-13. High severity, CVSS 7.5. EPSS: 87.4% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the…
CVE-2019-9514, published 2019-08-13. High severity, CVSS 7.5. EPSS: 82.8% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service. The attacker opens a number of streams and sends an invalid request over each stream that…
CVE-2019-9513, published 2019-08-13. High severity, CVSS 7.5. EPSS: 81.6% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the…
CVE-2019-9511, published 2019-08-13. High severity, CVSS 7.5. EPSS: 59.5% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data…
CVE-2019-9516, published 2019-08-13. Medium severity, CVSS 6.5. EPSS: 56.3% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value,…
CVE-2019-9517, published 2019-08-13. High severity, CVSS 7.5. EPSS: 27.9% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without…
CVE-2019-9518, published 2019-08-13. High severity, CVSS 7.5. EPSS: 25.4% chance of exploitation in the next 30 days. Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the…
CVE-2020-27846, published 2020-12-21. Critical severity, CVSS 9.8. EPSS: 4.9% chance of exploitation in the next 30 days. A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity,…
CVE-2019-9900, published 2019-04-25. High severity, CVSS 8.3. EPSS: 3.7% chance of exploitation in the next 30 days. When parsing HTTP/1.x header values, Envoy 1.9.0 and before does not reject embedded zero characters (NUL, ASCII 0x0). This allows remote attackers crafting header values containing embedded NUL…

Latest

CVE-2026-47774, published 2026-06-17. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability in Envoy's HTTP/2 downstream request…
CVE-2026-44495, published 2026-06-11. High severity, CVSS 7.7. EPSS: 1% chance of exploitation in the next 30 days. Axios is a promise based HTTP client for the browser and Node.js. From 0.19.0 to before 0.31.1 and 1.15.2, Axios contains prototype-pollution gadgets in request config processing. If another…
CVE-2025-0752, published 2025-01-28. High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days. 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…
CVE-2022-3962, published 2023-09-23. Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days. A content spoofing vulnerability was found in Kiali. It was discovered that Kiali does not implement error handling when the page or endpoint being accessed cannot be found. This issue allows an…
CVE-2021-3586, published 2022-08-22. Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days. A flaw was found in servicemesh-operator. The NetworkPolicy resources installed for Maistra do not properly specify which ports may be accessed, allowing access to all ports on these resources from…
CVE-2021-3495, published 2021-06-01. High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days. An incorrect access control flaw was found in the kiali-operator in versions before 1.33.0 and before 1.24.7. This flaw allows an attacker with a basic level of access to the cluster (to deploy a…
CVE-2019-25014, published 2021-01-29. Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days. A NULL pointer dereference was found in pkg/proxy/envoy/v2/debug.go getResourceVersion in Istio pilot before 1.5.0-alpha.0. If a particular HTTP GET request is made to the pilot API endpoint, it is…
CVE-2020-1762, published 2020-04-27. High severity, CVSS 8.6. EPSS: 1.2% chance of exploitation in the next 30 days. An insufficient JWT validation vulnerability was found in Kiali versions 0.4.0 to 1.15.0 and was fixed in Kiali version 1.15.1, wherein a remote attacker could abuse this flaw by stealing a valid JWT…