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Fencer Vulns
high 8.2

CVE-2026-27654 in the critical feed json

NGINX ngx_http_dav_module vulnerability

published 2026-03-24 7 mo ago modified 2026-09-08 2 mo ago also BIT-nginx-2026-27654 , BIT-nginx-gateway-2026-27654 , EUVD-2026-14881

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
25.9%
EPSS 25.9% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami nginx 1.28.3, 1.29.7
  • bitnami nginx-gateway 1.28.3, 1.29.7
  • F5 NGINX Open Source 1.28.3, 1.29.7
  • F5 NGINX Plus R32 P5, R35 P2, R36 P3
  • Red Hat Red Hat Enterprise Linux 10 2:1.26.3-2.el10_1.1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 2:1.26.3-1.el10_0.8
  • Red Hat Red Hat Enterprise Linux 8 8100020260401080144.489197e6
  • Red Hat Red Hat Enterprise Linux 9 2:1.20.1-24.el9_7.2, 9070020260331134728.9, 9070020260407080353.9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 1:1.20.1-10.el9_0.3
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 1:1.20.1-14.el9_2.5
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 1:1.20.1-16.el9_4.5, 9040020260504195322.9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 2:1.20.1-22.el9_6.5, 9060020260504154614.9, 9060020260504194843.9
  • Red Hat Red Hat Hardened Images 1.30.0-1.hum1
  • Red Hat Red Hat Update Infrastructure 5 1776868774, 1776868842
  • nginx Debian 12 1.22.1-9+deb12u5
  • nginx Debian 13 1.26.3-3+deb13u3
  • nginx Debian 14 1.28.3-1

debian advisories DEBIAN-CVE-2026-27654

  • nginx Ubuntu 22.04 LTS 1.18.0-6ubuntu14.10
  • nginx Ubuntu 24.04 LTS 1.24.0-2ubuntu7.7
  • nginx Ubuntu 25.10 1.28.0-6ubuntu1.2
  • nginx Ubuntu Pro 14.04 LTS 1.4.6-1ubuntu3.9+esm6
  • nginx Ubuntu Pro 16.04 LTS 1.10.3-0ubuntu0.16.04.5+esm7
  • nginx Ubuntu Pro 18.04 LTS 1.14.0-0ubuntu1.11+esm2
  • nginx Ubuntu Pro 20.04 LTS 1.18.0-0ubuntu1.7+esm1

ubuntu advisories UBUNTU-CVE-2026-27654

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx hummingbird 1 1.30.0-1.hum1
  • nginx-core hummingbird 1 1.30.0-1.hum1
  • nginx-mod-mail hummingbird 1 1.30.0-1.hum1
  • nginx-filesystem hummingbird 1 1.30.0-1.hum1
  • nginx-mod-stream hummingbird 1 1.30.0-1.hum1
  • nginx-all-modules hummingbird 1 1.30.0-1.hum1
  • nginx-mod-http-perl hummingbird 1 1.30.0-1.hum1
  • nginx-mod-http-geoip hummingbird 1 1.30.0-1.hum1

red hat advisories RHSA-2026:15966RHSA-2026:15943RHSA-2026:15945RHSA-2026:15942RHSA-2026:14836RHSA-2026:13839

  • nginx openSUSE Tumbleweed 1.29.7-1.1

opensuse advisories openSUSE-SU-2026:10423-1

  • nginx AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-core AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-mod-mail AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-filesystem AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-mod-stream AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-all-modules AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-mod-http-perl AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1
  • nginx-mod-http-xslt-filter AlmaLinux 9 2:1.26.3-2.module_el9.7.0+223+9cd7031b.1

almalinux advisories ALSA-2026:7343ALSA-2026:7002ALSA-2026:6906ALSA-2026:6907ALSA-2026:6923

  • nginx Rocky Linux 9 2:1.20.1-24.el9_7.2.rocky.0.1
  • nginx Rocky Linux 9 2:1.26.3-2.module+el9.7.0+40103+2443f6d1
  • nginx Rocky Linux 10 2:1.26.3-2.el10_1.1
  • nginx Rocky Linux 8 1:1.24.0-3.module+el8.10.0+40144+38158758
  • nginx Rocky Linux 9 1:1.24.0-5.module+el9.7.0+40088+99dbd8cd.1.rocky.0.1

rocky linux advisories RLSA-2026:7002RLSA-2026:7343RLSA-2026:6906RLSA-2026:6907RLSA-2026:6923

  • nginx Alpine 3.24, Alpine 3.23, Alpine 3.22 1.28.3-r0

alpine advisories ALPINE-CVE-2026-27654

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx Azure Linux 3.0 1.28.3-1

azure linux advisories AZL-80774

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-27654 updated cvss 8.2

NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module

  • Red Hat CodeReady Linux Builder EUS (v.9.4) nginx-debuginfo 1.20.1-16.el9_4.5, nginx-mod-devel 1.20.1-16.el9_4.5, nginx-debugsource 1.20.1-16.el9_4.5, nginx-core-debuginfo 1.20.1-16.el9_4.5, nginx-mod-mail-debuginfo 1.20.1-16.el9_4.5, nginx-mod-stream-debuginfo 1.20.1-16.el9_4.5, +3 more
    fixed: vendor fix RHSA-2026:13839
  • Red Hat CodeReady Linux Builder EUS (v.9.6) nginx-debuginfo 1.20.1-22.el9_6.5, nginx-mod-devel 1.20.1-22.el9_6.5, nginx-debugsource 1.20.1-22.el9_6.5, nginx-core-debuginfo 1.20.1-22.el9_6.5, nginx-mod-mail-debuginfo 1.20.1-22.el9_6.5, nginx-mod-stream-debuginfo 1.20.1-22.el9_6.5, +3 more
    fixed: vendor fix RHSA-2026:13680
  • Red Hat Enterprise Linux AppStream (v. 8) nginx 1.24.0-3.module+el8.10.0+24155+8a5ade52, nginx-mod-mail 1.24.0-3.module+el8.10.0+24155+8a5ade52, nginx-filesystem 1.24.0-3.module+el8.10.0+24155+8a5ade52, nginx-mod-stream 1.24.0-3.module+el8.10.0+24155+8a5ade52, nginx-all-modules 1.24.0-3.module+el8.10.0+24155+8a5ade52, nginx-mod-http-perl 1.24.0-3.module+el8.10.0+24155+8a5ade52, +2 more
    fixed: vendor fix RHSA-2026:6907
  • Red Hat Enterprise Linux AppStream (v. 9) nginx 1.20.1-24.el9_7.2, nginx-core 1.20.1-24.el9_7.2, nginx 1.24.0-5.module+el9.7.0+24151+c43a3acf.2, nginx 1.26.3-2.module+el9.7.0+24173+4204b761.1, nginx-core 1.24.0-5.module+el9.7.0+24151+c43a3acf.2, nginx-core 1.26.3-2.module+el9.7.0+24173+4204b761.1, +14 more
    fixed: vendor fix RHSA-2026:6923
  • Red Hat Enterprise Linux AppStream (v. 10) nginx 1.26.3-2.el10_1.1, nginx-core 1.26.3-2.el10_1.1
    fixed: vendor fix RHSA-2026:6906
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) nginx 1.20.1-10.el9_0.3, nginx-mod-mail 1.20.1-10.el9_0.3, nginx-filesystem 1.20.1-10.el9_0.3, nginx-mod-stream 1.20.1-10.el9_0.3, nginx-all-modules 1.20.1-10.el9_0.3, nginx-mod-http-perl 1.20.1-10.el9_0.3, +2 more
    fixed: vendor fix RHSA-2026:15942
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) nginx 1.20.1-14.el9_2.5, nginx-core 1.20.1-14.el9_2.5, nginx-mod-mail 1.20.1-14.el9_2.5, nginx-filesystem 1.20.1-14.el9_2.5, nginx-mod-stream 1.20.1-14.el9_2.5, nginx-all-modules 1.20.1-14.el9_2.5, +3 more
    fixed: vendor fix RHSA-2026:14836
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) nginx 1.26.3-1.el10_0.8, nginx-core 1.26.3-1.el10_0.8, nginx-mod-mail 1.26.3-1.el10_0.8, nginx-filesystem 1.26.3-1.el10_0.8, nginx-mod-stream 1.26.3-1.el10_0.8, nginx-all-modules 1.26.3-1.el10_0.8, +3 more
    fixed: vendor fix RHSA-2026:13634
show 6 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) nginx 1.20.1-16.el9_4.5, nginx-core 1.20.1-16.el9_4.5, nginx-mod-mail 1.20.1-16.el9_4.5, nginx-filesystem 1.20.1-16.el9_4.5, nginx-mod-stream 1.20.1-16.el9_4.5, nginx-all-modules 1.20.1-16.el9_4.5, +12 more
    fixed: vendor fix RHSA-2026:13839
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) nginx 1.20.1-22.el9_6.5, nginx-core 1.20.1-22.el9_6.5, nginx-mod-mail 1.20.1-22.el9_6.5, nginx-filesystem 1.20.1-22.el9_6.5, nginx-mod-stream 1.20.1-22.el9_6.5, nginx-all-modules 1.20.1-22.el9_6.5, +21 more
    fixed: vendor fix RHSA-2026:15945
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) nginx-debuginfo 1.26.3-1.el10_0.8, nginx-mod-devel 1.26.3-1.el10_0.8, nginx-debugsource 1.26.3-1.el10_0.8, nginx-core-debuginfo 1.26.3-1.el10_0.8, nginx-mod-mail-debuginfo 1.26.3-1.el10_0.8, nginx-mod-stream-debuginfo 1.26.3-1.el10_0.8, +3 more
    fixed: vendor fix RHSA-2026:13634
  • Red Hat Hardened Images nginx 1.30.0-1.hum1, nginx-core 1.30.0-1.hum1, nginx-mod-mail 1.30.0-1.hum1, nginx-filesystem 1.30.0-1.hum1, nginx-mod-stream 1.30.0-1.hum1, nginx-all-modules 1.30.0-1.hum1, +5 more
    fixed: vendor fix RHSA-2026:8346
  • Red Hat Update Infrastructure 5 rhui5 1776868774, rhui5 1776868842
    fixed: vendor fix RHSA-2026:10065
  • Red Hat Enterprise Linux AppStream (v. 9) nginx 1.20.1-24.el9_7.2, nginx-mod-mail 1.20.1-24.el9_7.2, nginx-filesystem 1.20.1-24.el9_7.2, nginx-mod-stream 1.20.1-24.el9_7.2, nginx-all-modules 1.20.1-24.el9_7.2, nginx-mod-http-perl 1.20.1-24.el9_7.2, +2 more Red Hat Enterprise Linux AppStream (v. 10) nginx 1.26.3-2.el10_1.1, nginx-mod-mail 1.26.3-2.el10_1.1, nginx-filesystem 1.26.3-2.el10_1.1, nginx-mod-stream 1.26.3-2.el10_1.1, nginx-all-modules 1.26.3-2.el10_1.1, nginx-mod-http-perl 1.26.3-2.el10_1.1, +2 more Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) nginx-debuginfo 1.20.1-24.el9_7.2, nginx-mod-devel 1.20.1-24.el9_7.2, nginx-debugsource 1.20.1-24.el9_7.2, nginx-core-debuginfo 1.20.1-24.el9_7.2, nginx-mod-mail-debuginfo 1.20.1-24.el9_7.2, nginx-mod-stream-debuginfo 1.20.1-24.el9_7.2, +3 more Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) nginx-debuginfo 1.26.3-2.el10_1.1, nginx-mod-devel 1.26.3-2.el10_1.1, nginx-debugsource 1.26.3-2.el10_1.1, nginx-core-debuginfo 1.26.3-2.el10_1.1, nginx-mod-mail-debuginfo 1.26.3-2.el10_1.1, nginx-mod-stream-debuginfo 1.26.3-2.el10_1.1, +3 more Red Hat Update Infrastructure 5 rhui5 1776868744, rhui5 1776868772
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

25.94% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CNA 4.0 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
CISA ADP 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CNA 4.0 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

Affected packages

ecosystem package affected fixed in
bitnami nginx
>=0.5.13, <1.28.3
>=1.29.0, <1.29.7
1.28.3
1.29.7
bitnami nginx-gateway
>=0.5.13, <1.28.3
>=1.29.0, <1.29.7
1.28.3
1.29.7

Affected products

  • F5 NGINX Open Source
  • F5 NGINX Plus
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Update Infrastructure 5

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow
  • CWE-120 Buffer Copy without Checking Size of Input
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.