How severe is CVE-2026-33011?

CVE-2026-33011 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-33011 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33011?

CVE-2026-33011 affects Nestjs Nest. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33011?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33011 have an EU (EUVD) identifier?

Yes. CVE-2026-33011 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13549.

When was CVE-2026-33011 published?

CVE-2026-33011 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-33011

CVE-2026-33011 is a high-severity vulnerability in Nestjs Nest with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-670.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13549
Weakness: CWE-670
Affected product: Nestjs Nest
Published: 2026-03-20
Last modified: 2026-06-17

Description

Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.

Frequently asked questions

What is CVE-2026-33011?: Nest is a framework for building scalable Node.js server-side applications. In versions 11.1.15 and below, a NestJS application using @nestjs/platform-fastify GET middleware can be bypassed because Fastify automatically redirects HEAD requests to the corresponding GET handlers (if they exist). As a result: middleware will be completely skipped, the HTTP response won't include a body (since the response is truncated when redirecting a HEAD request to a GET handler), and the actual handler will still be executed. This issue is fixed in version 11.1.16.
How severe is CVE-2026-33011?: CVE-2026-33011 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-33011 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33011?: CVE-2026-33011 affects Nestjs Nest. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33011?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33011 have an EU (EUVD) identifier?: Yes. CVE-2026-33011 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13549.
When was CVE-2026-33011 published?: CVE-2026-33011 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nestjs:nest:*:*:*:*:*:node.js:*:*

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