UBUNTU-CVE-2026-8711
- Source
- https://ubuntu.com/security/CVE-2026-8711
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8711.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-8711
- Upstream
- Downstream
- Related
- Published
- 2026-05-19T15:16:00Z
- Modified
- 2026-06-18T00:30:06Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlled NGINX variable (for example, $http_, $arg_, $cookie_*) and a location invoking the ngx.fetch() operation from NGINX JavaScript. An unauthenticated attacker 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. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- References
Affected packages
Ubuntu:Pro:26.04:LTS / libnginx-mod-js
Package
- Name
- libnginx-mod-js
- Purl
- pkg:deb/ubuntu/libnginx-mod-js?arch=source&distro=esm-apps%2Fresolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed0.9.4-1ubuntu0.1~esm1
Affected versions
0.*
0.9.1-1ubuntu2
0.9.1-1ubuntu3
0.9.4-1~build1
0.9.4-1
0.9.4-1build1
0.9.4-1build2
Ecosystem specific
{
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libnginx-mod-http-js",
"binary_version": "0.9.4-1ubuntu0.1~esm1"
},
{
"binary_name": "libnginx-mod-stream-js",
"binary_version": "0.9.4-1ubuntu0.1~esm1"
},
{
"binary_name": "njs",
"binary_version": "0.9.4-1ubuntu0.1~esm1"
}
]
}