RHSA-2026:54389
Vulnerability from csaf_redhat - Published: 2026-08-12 14:18 - Updated: 2026-09-05 21:27A flaw was found in brace-expansion. A remote attacker can exploit this vulnerability by providing specially crafted input to the expand() function, which can lead to excessive memory consumption. This can cause a denial of service (DoS) by crashing the application due to an out-of-memory error.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
A flaw was found in the brace-expansion library. The `expand()` function does not apply `maxLength` when constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop, resulting in a denial of service. This issue is due to an incomplete mitigation of CVE-2026-14257.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
A flaw was found in undici. The software's caching mechanism, when operating in shared cache mode, improperly stores responses that include 'Set-Cookie' headers. This oversight allows an untrusted server to inject cookies into cached responses. Consequently, sensitive cookie information from one user can be inadvertently disclosed to another user accessing the same cached content.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 | — |
Vendor Fix
fix
|
A flaw was found in undici, a Node.js HTTP/1.1 client. When the dump interceptor processes oversized chunked responses that do not declare a Content-Length, it prematurely signals completion. This causes the application to receive an incomplete or empty response body, while the network connection is unexpectedly closed. This issue can lead to applications processing partial data or encountering unexpected connection disruptions.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 | — |
Vendor Fix
fix
|
A flaw was found in undici. When the cache or deduplicate interceptor is directly composed onto a Client or Pool, the destination origin is omitted from cache and request-deduplication keys. This allows a remote attacker to perform cross-origin cache poisoning, leading to information disclosure and potentially a full authentication bypass. An attacker could exploit this by having a trusted origin accept a malicious token, without contacting the legitimate trusted origin.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 | — |
Vendor Fix
fix
|
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"text": "A flaw was found in brace-expansion. A remote attacker can exploit this vulnerability by providing specially crafted input to the expand() function, which can lead to excessive memory consumption. This can cause a denial of service (DoS) by crashing the application due to an out-of-memory error.",
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"text": "brace-expansion: Brace-expansion: Denial of Service via memory exhaustion in expand() function",
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"text": "A flaw was found in the brace-expansion npm package. The expand() function limits the number of generated results but does not bound the length of each result string. By chaining multiple brace groups, an attacker can keep the result count under the limit while making each result progressively longer, causing total memory consumption to grow until the Node.js process crashes with an uncatchable out-of-memory error. This affects any application that passes attacker-influenced strings to brace-expansion directly or transitively via minimatch or glob brace patterns.\n\nNote: In the majority of Red Hat products, brace-expansion is brought in as a transitive dependency of minimatch or glob and is not used at runtime. It is typically only invoked during build or development tooling and is not directly exposed to untrusted network input, reducing the practical exploitability of this flaw.\n\n```\n$ npm ls --omit=dev brace-expansion\nnpm@10.9.8 /usr/lib/node_modules/npm\n`-- minimatch@9.0.9\n `-- brace-expansion@2.0.2\n```",
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"details": "Do not pass untrusted or user-controlled input to brace-expansion\u0027s expand() function or to libraries that use it for glob pattern matching (such as minimatch or glob). Validate and sanitize any brace patterns before expansion.\n\nWhere possible, upgrade to brace-expansion 1.1.17, 2.1.3, 3.0.3, or 5.0.8 which add a maxLength option that bounds accumulated output.\n\nAs an additional defense-in-depth measure, enforce memory limits on Node.js processes using operating system resource controls such as cgroups or Kubernetes resource limits (spec.containers[].resources.limits.memory) to prevent a single process from exhausting system memory and causing a wider outage.",
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"ids": [
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"notes": [
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"text": "A flaw was found in the brace-expansion library. The `expand()` function does not apply `maxLength` when constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop, resulting in a denial of service. This issue is due to an incomplete mitigation of CVE-2026-14257.",
"title": "Vulnerability description"
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:54389"
},
{
"category": "workaround",
"details": "To mitigate this vulnerability, do not pass untrusted input to the expand() function.",
"product_ids": [
"Red Hat Hardened Images:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation"
},
{
"cve": "CVE-2026-84933",
"cwe": {
"id": "CWE-524",
"name": "Use of Cache Containing Sensitive Information"
},
"discovery_date": "2026-09-04T17:10:59.058130+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528756"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in undici. The software\u0027s caching mechanism, when operating in shared cache mode, improperly stores responses that include \u0027Set-Cookie\u0027 headers. This oversight allows an untrusted server to inject cookies into cached responses. Consequently, sensitive cookie information from one user can be inadvertently disclosed to another user accessing the same cached content.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "undici: undici: Cross-user cookie disclosure via Set-Cookie caching",
"title": "Vulnerability summary"
},
{
"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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-84933"
},
{
"category": "external",
"summary": "RHBZ#2528756",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528756"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-84933",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84933"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-84933",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84933"
},
{
"category": "external",
"summary": "https://cna.openjsf.org/security-advisories.html",
"url": "https://cna.openjsf.org/security-advisories.html"
},
{
"category": "external",
"summary": "https://github.com/nodejs/undici/security/advisories/GHSA-2jfj-6hjv-fm6j",
"url": "https://github.com/nodejs/undici/security/advisories/GHSA-2jfj-6hjv-fm6j"
}
],
"release_date": "2026-09-04T16:59:08.807000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-12T14:18:37+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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:54389"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "undici: undici: Cross-user cookie disclosure via Set-Cookie caching"
},
{
"cve": "CVE-2026-84947",
"cwe": {
"id": "CWE-130",
"name": "Improper Handling of Length Parameter Inconsistency"
},
"discovery_date": "2026-09-04T17:01:36.613728+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528754"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in undici, a Node.js HTTP/1.1 client. When the dump interceptor processes oversized chunked responses that do not declare a Content-Length, it prematurely signals completion. This causes the application to receive an incomplete or empty response body, while the network connection is unexpectedly closed. This issue can lead to applications processing partial data or encountering unexpected connection disruptions.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "undici: Undici: Response truncation and connection termination",
"title": "Vulnerability summary"
},
{
"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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-84947"
},
{
"category": "external",
"summary": "RHBZ#2528754",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528754"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-84947",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84947"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-84947",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84947"
},
{
"category": "external",
"summary": "https://cna.openjsf.org/security-advisories.html",
"url": "https://cna.openjsf.org/security-advisories.html"
},
{
"category": "external",
"summary": "https://github.com/nodejs/undici/security/advisories/GHSA-2gqq-gqf2-x968",
"url": "https://github.com/nodejs/undici/security/advisories/GHSA-2gqq-gqf2-x968"
}
],
"release_date": "2026-09-04T16:53:11.716000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-12T14:18:37+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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:54389"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"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": [
"Red Hat Hardened Images:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "undici: Undici: Response truncation and connection termination"
},
{
"cve": "CVE-2026-85152",
"cwe": {
"id": "CWE-346",
"name": "Origin Validation Error"
},
"discovery_date": "2026-09-04T16:41:35.623977+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528717"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in undici. When the cache or deduplicate interceptor is directly composed onto a Client or Pool, the destination origin is omitted from cache and request-deduplication keys. This allows a remote attacker to perform cross-origin cache poisoning, leading to information disclosure and potentially a full authentication bypass. An attacker could exploit this by having a trusted origin accept a malicious token, without contacting the legitimate trusted origin.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "undici: undici: Authentication bypass via cross-origin cache poisoning due to missing origin isolation",
"title": "Vulnerability summary"
},
{
"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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-85152"
},
{
"category": "external",
"summary": "RHBZ#2528717",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528717"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-85152",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-85152"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-85152",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85152"
},
{
"category": "external",
"summary": "https://cna.openjsf.org/security-advisories.html",
"url": "https://cna.openjsf.org/security-advisories.html"
},
{
"category": "external",
"summary": "https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm",
"url": "https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm"
}
],
"release_date": "2026-09-04T16:36:28.085000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-12T14:18:37+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:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:54389"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:nodejs26-main@aarch64",
"Red Hat Hardened Images:nodejs26-main@noarch",
"Red Hat Hardened Images:nodejs26-main@src",
"Red Hat Hardened Images:nodejs26-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "undici: undici: Authentication bypass via cross-origin cache poisoning due to missing origin isolation"
}
]
}
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.