CVE-2026-45109

highpriority · track · 0OT risk · elevatedEPSS 0.006 · 49 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.60% (49th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-26

Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-288USCWE-288USCWE-288USCWE-358US

affected products (8)

Products and version ranges known to be affected.

vercel next.js15.2.0, → 15.5.17enisa_euvdEU
vercel next.js16.0.0, → 16.2.6enisa_euvdEU
vercel next.js15.2.0 → 15.5.18fstec_bduRU
vercel next.js16.0.0 → 16.2.6fstec_bduRU
vercel next.js15.2.0 → 15.5.18nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
vercel next.js16.0.0 → 16.2.6nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
npm next15.2.0 → 15.5.18osvUSpkg:npm/next
npm next16.0.0 → 16.2.6osvUSpkg:npm/next

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-26hh-7cqf-hhc6Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up2026-05-11ghsa · osvUS
### Impact It was found that the fix addressing [CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f) did not apply to `middleware.ts` with Turbopack. Refer to [CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f) for further details. ### References - [CVE CVE-2026-44575](https://github.com/vercel/next.js/security/advisories/GHSA-267c-6grr-h53f)

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2026-05-13modified 2026-08-13

references (11)

External citations — patches, advisories, analysis.

scry

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