CVE-2024-31079 | NGINX HTTP/3 QUIC vulnerability

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module, undisclosed HTTP/3 requests can cause NGINX worker processes to terminate or cause other potential impact. This attack requires that a request be specifically timed during the connection draining process, which the attacker has no visibility and limited influence over.

Published: 2024-05-29 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-31079 is rated Low Risk (38.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.87%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-31079

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.83% 0.87% +0.04%
2 2026-05-28 0.48% 0.83% +0.35%
3 2026-03-04 — 0.48% —

Full EPSS history (44 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-31079

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 2.5 [email protected]
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 2.5 [email protected]

Weakness enumeration for CVE-2024-31079

OS Trackers for CVE-2024-31079

vendor priority summary link
debian unimportant CVE-2024-31079 unimportant priority: Debian including 1 source packages (nginx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-31079
redhat medium — https://access.redhat.com/security/cve/CVE-2024-31079
suse medium CVE-2024-31079 severity moderate: SUSE including 2 source package names (nginx, nginx-source), 39 product×package rows across 20 product lines (SUSE Enterprise Storage 7.1, SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS, … (20 product lines)): Known Not Affected 39. https://www.suse.com/security/cve/CVE-2024-31079/
ubuntu medium CVE-2024-31079 medium priority: Ubuntu including 1 source packages (nginx), 8 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 7, released 1. https://ubuntu.com/security/CVE-2024-31079

Affected software / configurations for CVE-2024-31079

Vendor Product Version Raw CPE
f5 nginx_open_source >= 1.25.0, < 1.26.1 cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:-:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:p1:*:*:*:*:*:*
f5 nginx_plus r30 cpe:2.3:a:f5:nginx_plus:r30:p2:*:*:*:*:*:*
f5 nginx_plus r31 cpe:2.3:a:f5:nginx_plus:r31:-:*:*:*:*:*:*
f5 nginx_plus r31 cpe:2.3:a:f5:nginx_plus:r31:p1:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
fedoraproject fedora 40 cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*

References for CVE-2024-31079

cvelogic Threat Intelligence