NGINX ngx_http_core_module vulnerability
A vulnerability exists in NGINX Plus and NGINX Open Source when a location is configured that uses the alias directive together with rewrite and a set or return directive referencing the $request_filename variable. Alternatively, the same result could be achieved when the $request_filename variable is used in an access log format directive. 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.
CVE-2026-15176
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-15176
NGINX Plus
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
NGINX Open Source
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "F5",
"modules": [
"ngx_http_core_module"
],
"product": "NGINX Plus",
"versions": [
{
"status": "affected",
"version": "37.1.0",
"lessThan": "37.1.0.1",
"versionType": "custom"
},
{
"status": "affected",
"version": "37.0.0",
"lessThan": "37.0.5.1",
"versionType": "custom"
},
{
"status": "affected",
"version": "R36",
"lessThan": "*",
"versionType": "custom"
},
{
"status": "affected",
"version": "R35",
"lessThan": "*",
"versionType": "custom"
},
{
"status": "affected",
"version": "R34",
"lessThan": "*",
"versionType": "custom"
},
{
"status": "affected",
"version": "R33",
"lessThan": "*",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "F5",
"modules": [
"ngx_http_core_module"
],
"product": "NGINX Open Source",
"versions": [
{
"status": "affected",
"version": "1.31.0",
"lessThan": "1.31.7",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.1.29",
"lessThan": "1.30.6",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-15176
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #28646 · Revision 1
- Added to Heist Feed
- Publisher date