NGINX ngx_http_dav_module vulnerability (F5 NGINX Open Source)

CVE-2026-27654

HIGH 8.8

En bref

Source: NVD
EPSS: EPSS 25.94 % · centile 98 (2026-10-29)
État: PUBLISHED
Publiée: 2026-03-24 14:13 UTC
Mise à jour: 2026-07-15 01:13 UTC
Attribuée par: f5
Statut NVD: Modified

Description

NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_dav_module module that might allow an attacker to trigger a buffer overflow to the NGINX worker process; this vulnerability may result in termination of the NGINX worker process or modification of source or destination file names outside the document root. This issue affects NGINX Open Source and NGINX Plus when the configuration file uses DAV module MOVE or COPY methods, prefix location (nonregular expression location configuration), and alias directives. The integrity impact is constrained because the NGINX worker process user has low privileges and does not have access to the entire system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Faiblesses (CWE)

CWE-122 — Débordement de tampon sur le tas
CWE-120 — Copie de tampon sans vérification de taille (débordement classique)

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	f5
CVSS 4.0	HIGH 8.8	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N	f5
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	redhat-SADP
CVSS 4.0	HIGH 8.8	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/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	NVD · f5sirt@f5.com (Secondary)
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	NVD · f5sirt@f5.com (Secondary)
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Références européennes

ENISA EUVD · EUVD-2026-14881
GCVE · GCVE-0-2026-27654

Avis du CERT-FR

CERTFR-2026-AVI-1056 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
CERTFR-2026-AVI-0376 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2026-AVI-0352 — Multiples vulnérabilités dans les produits F5 · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r32:p4:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r33:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r34:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r35:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r35:p1:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r36:*:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_plus:r36:p2:*:*:*:*:*:*
cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* ≥ 0.5.13 ≤ 0.9.7
cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* ≥ 1.0.0 < 1.28.3
cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* ≥ 1.29.0 < 1.29.7

Produits affectés

Produit	Versions
F5 · NGINX Open Source	affected 1.29.0 < 1.29.7 ; affected 0.5.13 < 1.28.3
F5 · NGINX Plus	affected R36 < R36 P3 ; affected R35 < R35 P2 ; affected R34 < * ; affected R33 < * ; affected R32 < R32 P5

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

⚠️ NGINX ngx_http_dav_module vulnerability (F5 NGINX Open Source)