oesa-2026-3216
Vulnerability from osv_openeuler
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.
Security Fix(es):
A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression 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.(CVE-2026-42533)
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process.
Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. 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-2026-56434)
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_slice_module module. When the slice directive and unnamed regex captures are configured or when a background cache update happens, unauthenticated attackers can send requests that may cause uninitialized memory access in the NGINX worker process, leading to limited disclosure of memory or a restart.
Impact: This vulnerability may allow remote, unauthenticated attackers to have limited control to disclose memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: The ngx_http_slice_module module is not enabled by default; it's enabled with the --with-http_slice_module configuration parameter.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-60005)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
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"nginx-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-debuginfo-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-debugsource-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-devel-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-http-image-filter-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-http-perl-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-mail-1.21.5-19.oe2203sp4.aarch64.rpm",
"nginx-mod-stream-1.21.5-19.oe2203sp4.aarch64.rpm"
],
"noarch": [
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"nginx-filesystem-1.21.5-19.oe2203sp4.noarch.rpm",
"nginx-help-1.21.5-19.oe2203sp4.noarch.rpm"
],
"src": [
"nginx-1.21.5-19.oe2203sp4.src.rpm"
],
"x86_64": [
"nginx-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-debuginfo-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-debugsource-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-devel-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-http-image-filter-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-http-perl-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-mail-1.21.5-19.oe2203sp4.x86_64.rpm",
"nginx-mod-stream-1.21.5-19.oe2203sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:22.03-LTS-SP4",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-22.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.21.5-19.oe2203sp4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"compat-nginx-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-debuginfo-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-debugsource-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-image-filter-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-perl-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-mail-1.24.0-14.oe2403sp1.aarch64.rpm",
"compat-nginx-mod-stream-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp1.aarch64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp1.aarch64.rpm"
],
"noarch": [
"compat-nginx-all-modules-1.24.0-14.oe2403sp1.noarch.rpm",
"compat-nginx-filesystem-1.24.0-14.oe2403sp1.noarch.rpm",
"compat-nginx-help-1.24.0-14.oe2403sp1.noarch.rpm",
"nginx-filesystem-1.24.0-14.oe2403sp1.noarch.rpm",
"nginx-help-1.24.0-14.oe2403sp1.noarch.rpm",
"nginx-all-modules-1.24.0-14.oe2403sp1.noarch.rpm"
],
"src": [
"compat-nginx-1.24.0-14.oe2403sp1.src.rpm",
"nginx-1.24.0-14.oe2403sp1.src.rpm"
],
"x86_64": [
"compat-nginx-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-debuginfo-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-debugsource-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-image-filter-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-perl-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-mail-1.24.0-14.oe2403sp1.x86_64.rpm",
"compat-nginx-mod-stream-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp1.x86_64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP1",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-24.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.24.0-14.oe2403sp1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"nginx-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp3.aarch64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp3.aarch64.rpm"
],
"noarch": [
"nginx-all-modules-1.24.0-14.oe2403sp3.noarch.rpm",
"nginx-filesystem-1.24.0-14.oe2403sp3.noarch.rpm",
"nginx-help-1.24.0-14.oe2403sp3.noarch.rpm"
],
"src": [
"nginx-1.24.0-14.oe2403sp3.src.rpm"
],
"x86_64": [
"nginx-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp3.x86_64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp3.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP3",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-24.03-LTS-SP3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.24.0-14.oe2403sp3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"nginx-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp4.aarch64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp4.aarch64.rpm"
],
"noarch": [
"nginx-all-modules-1.24.0-14.oe2403sp4.noarch.rpm",
"nginx-filesystem-1.24.0-14.oe2403sp4.noarch.rpm",
"nginx-help-1.24.0-14.oe2403sp4.noarch.rpm"
],
"src": [
"nginx-1.24.0-14.oe2403sp4.src.rpm"
],
"x86_64": [
"nginx-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-debuginfo-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-debugsource-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-devel-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-http-image-filter-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-http-perl-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-mail-1.24.0-14.oe2403sp4.x86_64.rpm",
"nginx-mod-stream-1.24.0-14.oe2403sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP4",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-24.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.24.0-14.oe2403sp4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"nginx-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-debuginfo-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-debugsource-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-devel-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-http-image-filter-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-http-perl-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-http-xslt-filter-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-mail-1.21.5-17.oe2003sp4.aarch64.rpm",
"nginx-mod-stream-1.21.5-17.oe2003sp4.aarch64.rpm"
],
"noarch": [
"nginx-all-modules-1.21.5-17.oe2003sp4.noarch.rpm",
"nginx-filesystem-1.21.5-17.oe2003sp4.noarch.rpm"
],
"src": [
"nginx-1.21.5-17.oe2003sp4.src.rpm"
],
"x86_64": [
"nginx-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-debuginfo-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-debugsource-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-devel-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-http-image-filter-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-http-perl-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-http-xslt-filter-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-mail-1.21.5-17.oe2003sp4.x86_64.rpm",
"nginx-mod-stream-1.21.5-17.oe2003sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:20.03-LTS-SP4",
"name": "nginx",
"purl": "pkg:rpm/openEuler/nginx\u0026distro=openEuler-20.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.21.5-17.oe2003sp4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.\r\n\r\nSecurity Fix(es):\n\nA vulnerability exists in NGINX Plus and NGINX Open Source when a map\u00a0directive uses regex matching and a string expression references the map\u0026apos;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.\n\nImpact:\nThis 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.\n\n\n\n\n\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-42533)\n\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module\u00a0module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off\u00a0directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process.\n\nImpact:\nThis vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only.\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-56434)\n\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_slice_module module. When the slice\u00a0directive and unnamed regex captures are configured or when a background cache update happens, unauthenticated attackers can send requests that may cause uninitialized memory access in the NGINX worker process, leading to limited disclosure of memory or a restart.\n\nImpact:\nThis vulnerability may allow remote, unauthenticated attackers to have limited control to disclose memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only.\nNote: The ngx_http_slice_module\u00a0module is not enabled by default; it\u0026apos;s enabled with the --with-http_slice_module\u00a0configuration parameter.\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.(CVE-2026-60005)",
"id": "OESA-2026-3216",
"modified": "2026-08-06T11:12:05Z",
"published": "2026-08-01T11:12:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3216"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42533"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56434"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-60005"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "nginx security update",
"upstream": [
"CVE-2026-42533",
"CVE-2026-56434",
"CVE-2026-60005"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
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