RHSA-2026:46012
Vulnerability from csaf_redhat - Published: 2026-07-26 10:28 - Updated: 2026-08-03 16:56Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
nginx:
* nginx-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-all-modules-1.30.4-2.hum1 (noarch)
* nginx-core-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-filesystem-1.30.4-2.hum1 (noarch)
* nginx-mod-devel-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-http-geoip-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-http-image-filter-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-http-perl-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-http-xslt-filter-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-mail-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-stream-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-mod-stream-geoip-1.30.4-2.hum1 (aarch64, x86_64)
* nginx-1.30.4-2.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in NGINX. An unauthenticated attacker can exploit this vulnerability by sending specially crafted HTTP requests when the `map` directive uses regular expression (regex) matching and references regex capture variables before referencing the map output variable. This can lead to a heap buffer overflow, which may allow for arbitrary code execution on systems where Address Space Layout Randomization (ASLR) is disabled or bypassed. Additionally, this flaw can cause a denial-of-service (DoS) due to the NGINX worker process restarting.
7.0 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nginx-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A vulnerability in NGINX's ngx_http_ssi_module allows an unauthenticated MITM attacker to trigger a heap buffer over-read by manipulating upstream server responses. This requires SSI, proxy_pass, and proxy_buffering off to be configured, and can result in memory modification or a Denial of Service (DoS).
6.5 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nginx-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A vulnerability in the NGINX ngx_http_slice_module allows remote, unauthenticated attackers to access uninitialized memory via crafted requests. If configured with unnamed regex captures or background cache updates, this flaw can result in limited memory disclosure or a denial-of-service crash.
8.2 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nginx-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nginx-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
22 references
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"title": "nginx: NGINX: Arbitrary code execution via crafted HTTP requests"
},
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"cwe": {
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"name": "Out-of-bounds Read"
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"title": "Vulnerability description"
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"text": "nginx: NGINX: Heap buffer over-read allows memory modification or denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Moderate severity vulnerability in NGINX affects configurations utilizing the `ngx_http_ssi_module` alongside `proxy_pass` and `proxy_buffering off`. Exploitation requires an unauthenticated man-in-the-middle attacker to control upstream server responses, leading to limited memory modification or a worker process restart. The specific combination of directives and an active MITM position limits the overall impact.",
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"details": "To prevent exploitation, avoid configuring NGINX with `ngx_http_ssi_module` when `proxy_pass` and `proxy_buffering off` are simultaneously active. If Server-Side Includes (SSI) are not essential, disable the `ngx_http_ssi_module` by removing or commenting out the `ssi on;` directive. Alternatively, ensure `proxy_buffering` is explicitly enabled (`proxy_buffering on;`) when `proxy_pass` is used with SSI. A reload or restart of the NGINX service is necessary for configuration changes to apply, which may cause a brief service interruption.",
"product_ids": [
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"scores": [
{
"cvss_v3": {
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"products": [
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"threats": [
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"details": "Moderate"
}
],
"title": "nginx: NGINX: Heap buffer over-read allows memory modification or denial of service"
},
{
"cve": "CVE-2026-60005",
"cwe": {
"id": "CWE-824",
"name": "Access of Uninitialized Pointer"
},
"discovery_date": "2026-07-15T16:00:58.750113+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2500992"
}
],
"notes": [
{
"category": "description",
"text": "A vulnerability in the NGINX ngx_http_slice_module allows remote, unauthenticated attackers to access uninitialized memory via crafted requests. If configured with unnamed regex captures or background cache updates, this flaw can result in limited memory disclosure or a denial-of-service crash.",
"title": "Vulnerability description"
},
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{
"category": "other",
"text": "Important: This vulnerability in NGINX\u0027s `ngx_http_slice_module` could lead to memory disclosure or denial of service. The impact on Red Hat products is reduced because the `ngx_http_slice_module` is not enabled by default. Exploitation requires explicit configuration of the module with the `slice` directive and unnamed regex captures, or during a background cache update, limiting exposure in typical deployments.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat Hardened Images:nginx-main@aarch64",
"Red Hat Hardened Images:nginx-main@noarch",
"Red Hat Hardened Images:nginx-main@src",
"Red Hat Hardened Images:nginx-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-60005"
},
{
"category": "external",
"summary": "RHBZ#2500992",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500992"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-60005",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-60005"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-60005",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-60005"
},
{
"category": "external",
"summary": "https://my.f5.com/manage/s/article/K000162100",
"url": "https://my.f5.com/manage/s/article/K000162100"
}
],
"release_date": "2026-07-15T15:04:21.040000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-26T10:28:59+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:nginx-main@aarch64",
"Red Hat Hardened Images:nginx-main@noarch",
"Red Hat Hardened Images:nginx-main@src",
"Red Hat Hardened Images:nginx-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:46012"
},
{
"category": "workaround",
"details": "To mitigate this issue, disable the ngx_http_slice_module entirely if it is not required.\nIf the module must be used, avoid unnamed regex captures with the slice directive and explicitly disable proxy_cache_background_update.\nReload or restart the NGINX service to apply these changes. Please note this may cause a brief service interruption.",
"product_ids": [
"Red Hat Hardened Images:nginx-main@aarch64",
"Red Hat Hardened Images:nginx-main@noarch",
"Red Hat Hardened Images:nginx-main@src",
"Red Hat Hardened Images:nginx-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:nginx-main@aarch64",
"Red Hat Hardened Images:nginx-main@noarch",
"Red Hat Hardened Images:nginx-main@src",
"Red Hat Hardened Images:nginx-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "nginx: NGINX: Memory disclosure and denial of service in ngx_http_slice_module"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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