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No exploitation reportedFix available

CVE-2026-44575

No exploitation reported by the sources we read.

  • Published2026-05-13
  • Fixed in16.2.5 · 15.5.16
  • WeaknessCWE-288 · CWE-551

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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 16.2.5.

Timeline

dates in UTC
  1. 2026-05-1317:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-44575?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-44575?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Next.js
BranchAffectedFixed in
16.x≥ 16.0.0, < 16.2.516.2.5
15.x≥ 15.2.0, < 15.5.1615.5.16

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • RHSA-2026:54435 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Streams for Apache Kafka 3.2.1 release and security update

  • RHSA-2026:40974 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: RHTAS 1.3.6 - Red Hat Trusted Artifact Signer Release

  • RHSA-2026:37272 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: RHTAS 1.4.2 - Red Hat Trusted Artifact Signer Release

  • RHSA-2026:34608 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Streams for Apache Kafka 2.9.4 release and security update

Full record on NVD

Fix

  1. Update Next.js to 16.2.5 · 15.5.16
  2. Vendor fix Red Hat Product Security RHSA-2026:54435 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2026:40974 · 1 productRed Hat Trusted Artifact Signer simplifies cryptographic signing and verifying of software artifacts such as container images, binaries and source code changes. It is a self-managed on-premise deployment of the Sigstore project available at https://sigstore.dev Platform Engineers, Software Develop…
  4. Workaround from the vendor Red Hat Product Security RHSA-2026:54435 · 1 productMitigation 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.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-05-13
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-288, CWE-551read 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-10-25
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2026-05-13
Last Modified
2026-08-13
NVD status
Modified

Frequently asked questions

What is CVE-2026-44575?

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 16.2.5.

Is CVE-2026-44575 actively exploited?

Active exploitation of CVE-2026-44575 has not been confirmed. Its EPSS score was 1.6% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-44575?

CVE-2026-44575 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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