🛡️ GHSA-9wmc-rg4h-28wv — kuma (CVE-2023-44487)

🟠 CVSS 8.0 — High ✅ No Known Exploit OSV

8.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

github.com/kumahq/kuma affected by CVE-2023-44487

Impact

Envoy and Go HTTP/2 protocol stack is vulnerable to the "Rapid Reset" class of exploits, which send a sequence of HEADERS frames optionally followed by RST_STREAM frames.

This can be exercised if you use the builtin gateway and receive untrusted http2 traffic.

Patches

https://github.com/kumahq/kuma/pull/8023

https://github.com/kumahq/kuma/pull/8001

https://github.com/kumahq/kuma/pull/8034

Workarounds

Disable http2 on the gateway listener with a MeshProxyPatch or ProxyTemplate.

References

https://github.com/advisories/GHSA-qppj-fm5r-hxr3

https://github.com/golang/go/issues/63417

https://github.com/envoyproxy/envoy/security/advisories/GHSA-jhv4-f7mr-xx76

https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack

https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/?sf269548684=1

https://www.envoyproxy.io/docs/envoy/latest/configuration/best_practices/edge

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

GHSA-9wmc-rg4h-28wv is recorded against 1 package.

github.com/kumahq/kuma

Timeline and source

Published on 17 October 2023 and last revised on 13 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Web)
cloud.google.com (Web)
github.com (Advisory)
github.com (Package)
www.envoyproxy.io (Web)
www.nginx.com (Web)

Details

Severity HIGH

CVSS Score 8.0

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2023-10-17

Updated 2026-08-20

Modified 2025-10-13

Fix URL N/A

Affected Packages

Software	From version	Fixed in
github.com/kumahq/kuma	—	—

References

WEB https://github.com/envoyproxy/envoy/security/advisories/GHSA-jhv4-f7mr-xx76

WEB https://github.com/kumahq/kuma/security/advisories/GHSA-9wmc-rg4h-28wv

WEB https://github.com/golang/go/issues/63417

WEB https://github.com/kumahq/kuma/pull/8001

WEB https://github.com/kumahq/kuma/pull/8023

WEB https://github.com/kumahq/kuma/pull/8034

WEB https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack

ADVISORY https://github.com/advisories/GHSA-qppj-fm5r-hxr3

PACKAGE https://github.com/kumahq/kuma

WEB https://www.envoyproxy.io/docs/envoy/latest/configuration/best_practices/edge

WEB https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/?sf269548684=1

🔗 NVD 🔗 Mitre

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