SECUFOCUSNOW
Home›CVE index›CVE-2026-44575
Review reviewHigh

CVE-2026-44575

vercel next.js, Streams for Apache Kafka 2.9.4, Red Hat Trusted Artifact Signer 1.3

Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.16 and 16.2.5, App Router applications that rely on middleware or proxy-based checks for authorization can allow unauthorized access through transport-specific route variants used for segment prefetching. In affected configurations, specially crafted .rsc and segment-prefetch URLs can resolve to the same page without being matched by the intended middleware rule, which can allow protected content to be reached without the expected authorization check. This vulnerability is fixed in 15.5.16 and...

CVSS
7.5
EPSS
1.56%
72.8% percentile
CISA KEV
Not listed
Published
2026.05.14
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability1.56%
Technical severityCVSS 7.5

Vulnerability overview

Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.16 and 16.2.5, App Router applications that rely on middleware or proxy-based checks for authorization can allow unauthorized access through transport-specific route variants used for segment prefetching. In affected configurations, specially crafted .rsc and segment-prefetch URLs can resolve to the same page without being matched by the intended middleware rule, which can allow protected content to be reached without the expected authorization check. This vulnerability is fixed in 15.5.16 and...

Affected product and versions

Product
vercel next.js, Streams for Apache Kafka 2.9.4, Red Hat Trusted Artifact Signer 1.3
Affected versions
>= >= 16.0.0, < 16.2.5, >= >= 15.2.0, < 15.5.16, >= 15.2.0 < 15.5.16, >= 16.0.0 < 16.2.5
Fixed versions
15.5.16, 16.2.5

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that vercel next.js, Streams for Apache Kafka 2.9.4, Red Hat Trusted Artifact Signer 1.3 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-288, CWE-551