EUVD-2026-78585
GHSA-fjgw-pmcm-g7j7
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (f5) · only source for this CVE.
CVSS VectorVendor: f5
Lifecycle Timeline
4DescriptionCVE.org
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption.
Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. 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.
AnalysisAI
Heap buffer overflow in the NGINX HTTP/3 module (ngx_http_v3_module) can crash NGINX worker processes or corrupt a limited amount of heap data when NGINX Plus or NGINX Open Source serves QUIC traffic while linked against OpenSSL 3.5.0 or earlier under certain configurations. The overflow occurs while processing a TLS handshake and is non-deterministic — triggering it is largely outside the attacker's control — so the realistic outcome is opportunistic denial of service (worker restart) plus limited data corruption rather than reliable remote code execution. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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