DEBIAN-CVE-2026-93479

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Source
https://security-tracker.debian.org/tracker/CVE-2026-93479
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93479.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-93479
Upstream
  • CVE-2026-93479
Published
2026-10-14T15:17:26Z
Modified
2026-10-15T08:03:03Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/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 CVSS Calculator
Summary
[none]
Details

A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the root directive or access log format references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact:  This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. 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.

References

Affected packages

Debian:12 / nginx

Package

Name
nginx
Purl
pkg:deb/debian/nginx?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.22.1-9
1.22.1-9+deb12u1
1.22.1-9+deb12u2
1.22.1-9+deb12u3
1.22.1-9+deb12u4
1.22.1-9+deb12u5
1.22.1-9+deb12u6
1.22.1-9+deb12u7
1.22.1-9+deb12u8
1.22.1-9+deb12u9
1.22.1-9+deb12u10
1.24.0-1~exp1
1.24.0-1
1.24.0-2
1.26.0-1~exp1
1.26.0-1
1.26.0-2
1.26.0-3
1.26.2-1
1.26.3-1
1.26.3-2
1.26.3-3
1.28.0-1
1.28.0-2
1.28.0-3
1.28.0-4
1.28.0-5
1.28.0-6
1.28.1-1
1.28.1-2
1.28.1-3
1.28.2-1
1.28.2-2
1.28.2-3
1.28.2-4
1.28.3-1
1.28.3-2
1.30.0-1
1.30.0-2
1.30.0-3
1.30.0-4
1.30.1-1
1.30.1-2
1.30.1-3
1.30.1-4
1.30.1-5
1.30.1-6
1.30.1-7
1.30.4-1
1.30.4-2
1.30.4-3
1.30.4-4
1.30.4-5
1.30.4-6
1.30.4-7
1.30.4-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93479.json"

Debian:13 / nginx

Package

Name
nginx
Purl
pkg:deb/debian/nginx?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.26.3-3
1.26.3-3+deb13u1
1.26.3-3+deb13u2
1.26.3-3+deb13u3
1.26.3-3+deb13u4
1.26.3-3+deb13u5
1.26.3-3+deb13u6
1.26.3-3+deb13u7
1.26.3-3+deb13u8
1.26.3-3+deb13u9
1.28.0-1
1.28.0-2
1.28.0-3
1.28.0-4
1.28.0-5
1.28.0-6
1.28.1-1
1.28.1-2
1.28.1-3
1.28.2-1
1.28.2-2
1.28.2-3
1.28.2-4
1.28.3-1
1.28.3-2
1.30.0-1
1.30.0-2
1.30.0-3
1.30.0-4
1.30.1-1
1.30.1-2
1.30.1-3
1.30.1-4
1.30.1-5
1.30.1-6
1.30.1-7
1.30.4-1
1.30.4-2
1.30.4-3
1.30.4-4
1.30.4-5
1.30.4-6
1.30.4-7
1.30.4-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93479.json"

Debian:14 / nginx

Package

Name
nginx
Purl
pkg:deb/debian/nginx?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.26.3-3
1.28.0-1
1.28.0-2
1.28.0-3
1.28.0-4
1.28.0-5
1.28.0-6
1.28.1-1
1.28.1-2
1.28.1-3
1.28.2-1
1.28.2-2
1.28.2-3
1.28.2-4
1.28.3-1
1.28.3-2
1.30.0-1
1.30.0-2
1.30.0-3
1.30.0-4
1.30.1-1
1.30.1-2
1.30.1-3
1.30.1-4
1.30.1-5
1.30.1-6
1.30.1-7
1.30.4-1
1.30.4-2
1.30.4-3
1.30.4-4
1.30.4-5
1.30.4-6
1.30.4-7
1.30.4-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93479.json"