Live › vulnerability › CVE-2023-44487
Go to dashboardHTTP/2 lets a client open and immediately cancel streams in rapid succession, forcing the server to do work for each one. An attacker can use this to knock web servers and proxies offline with a denial-of-service attack, and CISA reports it is being exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| IETF HTTP/2 | vendor | – | – |
| siemens simatic s7-1500 cpu 1518f-4 pn\/dp mfp firmware | vendor | >= 3.1.5 | – |
| siemens sinec ins | vendor | < 1.0 | 1.0 |
| siemens sinec ins | vendor | = 1.0 | – |
| siemens sinec nms | vendor | < 3.0 | 3.0 |
| siemens st7 scadaconnect | vendor | < 1.1 | 1.1 |
| siemens ruggedcom ape1808 firmware | vendor | – | – |
| siemens simatic s7-1500 cpu 1518-4 pn\/dp mfp firmware | vendor | >= 3.1.5 | – |
| siemens siplus s7-1500 cpu 1518-4 pn\/dp mfp firmware | vendor | >= 3.1.5 | – |
| ietf http | vendor | = 2.0 | – |
| nghttp2 | vendor | < 1.57.0 | 1.57.0 |
| netty | vendor | < 4.1.100 | 4.1.100 |
| envoyproxy envoy | vendor | = 1.24.10 | – |
| envoyproxy envoy | vendor | = 1.25.9 | – |
| envoyproxy envoy | vendor | = 1.26.4 | – |
| envoyproxy envoy | vendor | = 1.27.0 | – |
| eclipse jetty | vendor | < 9.4.53 | 9.4.53 |
| eclipse jetty | vendor | >= 10.0.0, < 10.0.17 | 10.0.17 |
| eclipse jetty | vendor | >= 11.0.0, < 11.0.17 | 11.0.17 |
| eclipse jetty | vendor | >= 12.0.0, < 12.0.2 | 12.0.2 |
| caddyserver caddy | vendor | < 2.7.5 | 2.7.5 |
| golang go | vendor | < 1.20.10 | 1.20.10 |
| golang go | vendor | >= 1.21.0, < 1.21.3 | 1.21.3 |
| golang http2 | vendor | < 0.17.0 | 0.17.0 |
| golang networking | vendor | < 0.17.0 | 0.17.0 |
| f5 big-ip access policy manager | vendor | >= 13.1.0, <= 13.1.5 | – |
| f5 big-ip access policy manager | vendor | >= 14.1.0, <= 14.1.5 | – |
| f5 big-ip access policy manager | vendor | >= 15.1.0, <= 15.1.10 | – |
| f5 big-ip access policy manager | vendor | >= 16.1.0, <= 16.1.4 | – |
| f5 big-ip access policy manager | vendor | = 17.1.0 | – |
| f5 big-ip advanced firewall manager | vendor | >= 13.1.0, <= 13.1.5 | – |
| f5 big-ip advanced firewall manager | vendor | >= 14.1.0, <= 14.1.5 | – |
| f5 big-ip advanced firewall manager | vendor | >= 15.1.0, <= 15.1.10 | – |
| f5 big-ip advanced firewall manager | vendor | >= 16.1.0, <= 16.1.4 | – |
| f5 big-ip advanced firewall manager | vendor | = 17.1.0 | – |
| f5 big-ip advanced web application firewall | vendor | >= 13.1.0, <= 13.1.5 | – |
| f5 big-ip advanced web application firewall | vendor | >= 14.1.0, <= 14.1.5 | – |
| f5 big-ip advanced web application firewall | vendor | >= 15.1.0, <= 15.1.10 | – |
| f5 big-ip advanced web application firewall | vendor | >= 16.1.0, <= 16.1.4 | – |
| f5 big-ip advanced web application firewall | vendor | = 17.1.0 | – |
| f5 big-ip analytics | vendor | >= 13.1.0, <= 13.1.5 | – |
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2023-44487")
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