CVE-2026-9675VulnerabilityPublished 13 Jun 2026Updated 8 Oct 2026

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Affects Red HatSource GCVE Database

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Not known to be exploited · fixed in Red Hat package updates : update Red Hat when convenient.

Data as of 31 Oct 2026, 20:20 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8.5.0

Exploitation evidence

Disclosed: evidence found.
CVE published 13 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected Red Hat Red Hat Hardened Images aarch64 nodejs24-main@aarch64 nodejs24-0:24.16.0-1.hum1@aarch64	Fixed in–

AI-suggested

No action is required for Red Hat products as they do not include the vulnerable undici versions. Users who have manually installed undici 8.x outside of Red Hat packages should upgrade to undici version 8.5.0 or later to fully resolve the issue.

Description

This update includes the following RPMs: nodejs24: * nodejs24-24.16.0-1.hum1 (aarch64, x86_64) * nodejs24-bin-24.16.0-1.hum1 (noarch) * nodejs24-devel-24.16.0-1.hum1 (aarch64, x86_64) * nodejs24-docs-24.16.0-1.hum1 (noarch) * nodejs24-full-i18n-24.16.0-1.hum1 (aarch64, x86_64) * nodejs24-libs-24.16.0-1.hum1 (aarch64, x86_64) * nodejs24-npm-11.13.0-1.24.16.0.1.hum1 (noarch) * nodejs24-npm-bin-24.16.0-1.hum1 (noarch) * v8-13.6-devel-13.6.233.17-1.24.16.0.1.hum1 (aarch64, x86_64) * nodejs24-24.16.0-1.hum1.src (src)

Impact

Successful exploitation allows a malicious WebSocket server to cause unbounded memory growth in the client process, resulting in memory exhaustion and denial of service. The impact is limited to denial of service without confidentiality or integrity loss. Red Hat products are not affected as they ship non-vulnerable undici versions. The attack requires connection to an attacker-controlled WebSocket server, which is unlikely in typical Red Hat environments.

Summary

CVE-2026-9675 describes a denial of service vulnerability in the undici HTTP client's WebSocket implementation. The flaw arises from unbounded accumulation of fragmented WebSocket frames, allowing a malicious server to cause memory exhaustion in the client. This vulnerability was introduced in undici version 8.0.0 and affects versions up to 8.4.x. Red Hat products bundle undici versions 5.x, 6.x, and 7.x, which do not include the vulnerable code path. Red Hat rates this issue as Moderate (CVSS 5.9) due to the requirement that the client connects to an attacker-controlled WebSocket server, which is unlikely in typical Red Hat deployments. No Red Hat product is affected. Users with manually installed undici 8.x should upgrade to 8.5.0 or later to resolve the vulnerability.

CWE-400Uncontrolled Resource Consumption (opens in a new tab)
Class weaknessLikelihood of exploit: High
The product does not properly control the allocation and maintenance of a limited resource.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place.
Architecture and Design
Mitigation of resource exhaustion attacks requires that the target system either: recognizes the attack and denies that user further access for a given amount of time, or; uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
Attack patterns
XML Ping of the Death (opens in a new tab)
Regular Expression Exponential Blowup (opens in a new tab)
Sustained Client Engagement (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Aug 2026, 17:32 UTC

WeaknessesCWE-400

Technical details

References

Community reviews

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