RHSA-2026:38009
Vulnerability from csaf_redhat - Published: 2026-07-10 17:41 - Updated: 2026-08-03 10:50Summary
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:
nodejs26:
* nodejs26-26.5.0-1.3.hum1 (aarch64, x86_64)
* nodejs26-bin-26.5.0-1.3.hum1 (noarch)
* nodejs26-devel-26.5.0-1.3.hum1 (aarch64, x86_64)
* nodejs26-docs-26.5.0-1.3.hum1 (noarch)
* nodejs26-full-i18n-26.5.0-1.3.hum1 (aarch64, x86_64)
* nodejs26-libs-26.5.0-1.3.hum1 (aarch64, x86_64)
* nodejs26-npm-11.17.0-1.26.5.0.1.3.hum1 (noarch)
* nodejs26-npm-bin-26.5.0-1.3.hum1 (noarch)
* v8-14.6-devel-14.6.202.34-1.26.5.0.1.3.hum1 (aarch64, x86_64)
* nodejs26-26.5.0-1.3.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 undici. An attacker-controlled upstream server can exploit a vulnerability in Undici's HTTP/1.1 client, specifically related to response queue poisoning on reused keep-alive sockets. This allows the attacker to inject an unsolicited HTTP/1.1 response onto an idle socket. Consequently, when the client dispatches a new request on that socket, it may associate the injected response with the new request, leading to responses being delivered to unintended recipients or requests. This could result in a low impact on data integrity.
CWE-940 - Improper Verification of Source of a Communication ChannelAffected products
Fixed
4 products
| 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
|
Threats
Impact
Low
A flaw was found in undici. The cookie parser in the `parseSetCookie` function incorrectly decodes cookie values, which is contrary to standard specifications. This vulnerability allows an attacker-controlled upstream to inject arbitrary HTTP response headers, such as `Set-Cookie`, `Location`, or `Cache-Control`. The primary consequence is HTTP response header injection, which can lead to session fixation, open redirect, or cache poisoning.
5.9 (Medium)
Affected products
Fixed
4 products
| 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
|
Threats
Impact
Moderate
A flaw was found in undici. A malicious WebSocket server can exploit this by streaming numerous small or empty continuation frames. This can bypass per-frame and cumulative-size validation, leading to unbounded memory growth in the client process. The primary consequence is memory exhaustion, resulting in a denial of service (DoS) for affected applications using the undici WebSocket client or WebSocketStream API.
7.5 (High)
Affected products
Fixed
4 products
| 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
|
Threats
Impact
Important
References
24 references
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"title": "undici: Undici: Response queue poisoning on reused keep-alive sockets can lead to incorrect response delivery."
},
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"text": "A flaw was found in undici. The cookie parser in the `parseSetCookie` function incorrectly decodes cookie values, which is contrary to standard specifications. This vulnerability allows an attacker-controlled upstream to inject arbitrary HTTP response headers, such as `Set-Cookie`, `Location`, or `Cache-Control`. The primary consequence is HTTP response header injection, which can lead to session fixation, open redirect, or cache poisoning.",
"title": "Vulnerability description"
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"text": "undici: undici vulnerable to HTTP header injection via Set-Cookie percent-decoding",
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"text": "Moderate: A flaw in the `undici` library\u0027s cookie parser can lead to HTTP response header injection. This occurs when applications, such as proxies or middleware, incorrectly forward percent-decoded cookie values from upstream into downstream response headers. Successful exploitation could result in session fixation, open redirects, or cache poisoning.",
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"scores": [
{
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"baseScore": 5.9,
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"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
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"scope": "UNCHANGED",
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],
"threats": [
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"details": "Moderate"
}
],
"title": "undici: undici vulnerable to HTTP header injection via Set-Cookie percent-decoding"
},
{
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"cwe": {
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},
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{
"category": "description",
"text": "A flaw was found in undici. A malicious WebSocket server can exploit this by streaming numerous small or empty continuation frames. This can bypass per-frame and cumulative-size validation, leading to unbounded memory growth in the client process. The primary consequence is memory exhaustion, resulting in a denial of service (DoS) for affected applications using the undici WebSocket client or WebSocketStream API.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "undici: undici: Denial of Service due to unbounded memory growth via WebSocket frames",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Important denial of service flaw in the `undici` WebSocket client allows a remote attacker to cause unbounded memory growth. By sending numerous small or empty WebSocket frames, an unauthenticated attacker can exhaust system memory, leading to a denial of service in Red Hat products that use the affected client.",
"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: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-2026-12151"
},
{
"category": "external",
"summary": "RHBZ#2489980",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489980"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-12151",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-12151"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-12151",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12151"
},
{
"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-vxpw-j846-p89q",
"url": "https://github.com/nodejs/undici/security/advisories/GHSA-vxpw-j846-p89q"
}
],
"release_date": "2026-06-17T16:05:38.785000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-10T17:41:23+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-2026:38009"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
"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": "undici: undici: Denial of Service due to unbounded memory growth via WebSocket frames"
}
]
}
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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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