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CVE-2026-59762— BIG-IP HTTP/2 vulnerability

Quick assessment

Affected
F5 BIG-IP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 big-ip是美国F5公司的一套应用交付控制器。 F5 BIG-IP存在资源管理错误漏洞，该漏洞源于HTTP/2 profile配置在虚拟服务器上时，未公开的请求可能导致内存资源利用率增加，进而导致系统性能下降至TMM进程被迫或手动重启，允许远程未经验证的攻击者造成服务降级直至拒绝服务。以下版本受到影响：21.1.0.1之前版本、21.0.0.3之前版本、17.5.1.8之前版本和17.1.3.4之前版本。

CVSS 7.5 · High EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 11

VendorProduct Version RangeStatus
F5 BIG-IP 21.1.0< 21.1.0.1 affected
21.0.0< 21.0.0.3 affected
17.5.0< 17.5.1.8 affected
17.1.0< 17.1.3.4 affected
F5 BIG-IP Next CNF 2.3.0< 2.3.2 affected
2.0.0< 2.2.3 affected
1.1.0< 1.4.3 affected
F5 BIG-IP Next for Kubernetes 2.3.0< 2.3.2 affected
2.0.0< 2.2.3 affected
F5 BIG-IP Next SPK 1.9.0< * affected
1.7.0< 1.7.18 affected
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I. Basic Information for CVE-2026-59762

Vulnerability Information
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Vulnerability Title
BIG-IP HTTP/2 vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization.   Impact: System performance can degrade until the TMM process is either forced to restart or is manually restarted. This vulnerability allows a remote, unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
F5 BIG-IP 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 big-ip是美国F5公司的一套应用交付控制器。 F5 BIG-IP存在资源管理错误漏洞，该漏洞源于HTTP/2 profile配置在虚拟服务器上时，未公开的请求可能导致内存资源利用率增加，进而导致系统性能下降至TMM进程被迫或手动重启，允许远程未经验证的攻击者造成服务降级直至拒绝服务。以下版本受到影响：21.1.0.1之前版本、21.0.0.3之前版本、17.5.1.8之前版本和17.1.3.4之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 BIG-IP 21.1.0 ~ 21.1.0.1 -
F5 BIG-IP Next for Kubernetes 2.3.0 ~ 2.3.2 -
F5 BIG-IP Next SPK 1.9.0 ~ * -
F5 BIG-IP Next CNF 2.3.0 ~ 2.3.2 -

II. Public POCs for CVE-2026-59762

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III. Intelligence Information for CVE-2026-59762

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Vendor Advisories for CVE-2026-59762 (1)

Same Patch Batch · F5 · 2026-07-15 · 8 CVEs total

CVE-2026-55723 8.3 HIGH NGINX Ingress Controller vulnerability
CVE-2026-60005 8.2 HIGH NGINX ngx_http_slice_module vulnerability
CVE-2026-42533 8.1 HIGH NGINX Map directive and Regex matching vulnerability
CVE-2026-52865 6.5 MEDIUM NGINX Ingress Controller vulnerability
CVE-2026-56434 6.5 MEDIUM NGINX ngx_http_ssi_module vulnerability
CVE-2026-60062 6.4 MEDIUM NGINX Agent Vulnerability
CVE-2026-60065 3.7 LOW NGINX Plus ngx_stream_mqtt_filter_module vulnerability

IV. Related Vulnerabilities

Same product: BIG-IP
Same vendor: F5
Same weakness: CWE-770

V. Comments for CVE-2026-59762

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