USN-8563-3

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Source
https://ubuntu.com/security/notices/USN-8563-3
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-3.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8563-3
Upstream
Related
Published
2026-08-19T12:01:08Z
Modified
2026-08-20T00:00:07Z
Summary
nginx vulnerability
Details

USN-8563-1 fixed vulnerabilities in nginx. The fix for CVE-2026-42533 was backed out in USN-8563-2 because it could cause a regression. This update includes a better fix for CVE-2026-42533.

We apologize for the inconvenience.

Original advisory details:

It was discovered that nginx incorrectly handled certain map directives using regex matching and capture variables. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-42533)

It was discovered that nginx had a use-after-free vulnerability in the ngx_http_ssi_module module when configured with Server-Side Includes, proxy_pass, and proxy buffering disabled directives. An attacker able to intercept traffic and control responses from an upstream server could possibly use this issue to cause nginx to crash, resulting in a denial of service. (CVE-2026-56434)

It was discovered that nginx incorrectly handled certain requests in the ngx_http_slice_module module. A remote attacker could possibly use this issue to obtain sensitive information or cause nginx to crash, resulting in a denial of service. (CVE-2026-60005)

References

Affected packages

Ubuntu:22.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.18.0-6ubuntu14.19

Affected versions

1.*
1.18.0-6ubuntu11
1.18.0-6ubuntu12
1.18.0-6ubuntu14
1.18.0-6ubuntu14.1
1.18.0-6ubuntu14.2
1.18.0-6ubuntu14.3
1.18.0-6ubuntu14.4
1.18.0-6ubuntu14.5
1.18.0-6ubuntu14.6
1.18.0-6ubuntu14.7
1.18.0-6ubuntu14.8
1.18.0-6ubuntu14.10
1.18.0-6ubuntu14.11
1.18.0-6ubuntu14.12
1.18.0-6ubuntu14.13
1.18.0-6ubuntu14.14
1.18.0-6ubuntu14.15
1.18.0-6ubuntu14.16
1.18.0-6ubuntu14.17
1.18.0-6ubuntu14.18

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnginx-mod-http-auth-pam",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-geoip2",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "libnginx-mod-stream-geoip2",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.18.0-6ubuntu14.19"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.18.0-6ubuntu14.19"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-3.json"

Ubuntu:24.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.24.0-2ubuntu7.16

Affected versions

1.*
1.24.0-1ubuntu1
1.24.0-2ubuntu1
1.24.0-2ubuntu2
1.24.0-2ubuntu3
1.24.0-2ubuntu4
1.24.0-2ubuntu6
1.24.0-2ubuntu7
1.24.0-2ubuntu7.1
1.24.0-2ubuntu7.3
1.24.0-2ubuntu7.4
1.24.0-2ubuntu7.5
1.24.0-2ubuntu7.6
1.24.0-2ubuntu7.7
1.24.0-2ubuntu7.8
1.24.0-2ubuntu7.9
1.24.0-2ubuntu7.10
1.24.0-2ubuntu7.11
1.24.0-2ubuntu7.12
1.24.0-2ubuntu7.13
1.24.0-2ubuntu7.14
1.24.0-2ubuntu7.15

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.24.0-2ubuntu7.16"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.24.0-2ubuntu7.16"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-3.json"

Ubuntu:26.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.28.3-2ubuntu1.9

Affected versions

1.*
1.28.0-6ubuntu1
1.28.1-2ubuntu1
1.28.1-3ubuntu1
1.28.2-2ubuntu1
1.28.3-2ubuntu1
1.28.3-2ubuntu1.1
1.28.3-2ubuntu1.2
1.28.3-2ubuntu1.3
1.28.3-2ubuntu1.4
1.28.3-2ubuntu1.5
1.28.3-2ubuntu1.6
1.28.3-2ubuntu1.7
1.28.3-2ubuntu1.8

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.28.3-2ubuntu1.9"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.28.3-2ubuntu1.9"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-3.json"