CVE-2025-49005

lowpriority · track · 0EPSS 0.005 · 42 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.49% (42nd) EPSS

CVSS 3.7 · low

Is it mine?

10 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3.

cvss

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

3.7

010

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

v3.13.7lowAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.2 · impact 1.4

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444USCWE-444US

affected products (10)

Products and version ranges known to be affected.

Vercel Next.js <15.2.0all versionscert_bundDE
Vercel Next.js <15.3.3all versionscert_bundDE
vercel next.js< 15.2.0cert_bundDE
vercel next.js< 15.3.3cert_bundDE
vercel next.js15.3.0, → 15.3.3enisa_euvdEU
Vercel Vercel CLI41.4.1 → 42.2.0fstec_bduRU
vercel next.js15.3.0 → 15.3.3fstec_bduRU
vercel next.js15.3.0 → 15.3.3nvdUScpe:2.3:a:vercel:next.js:*:*:*:*:*:*:*:*
vercel vercel41.4.1 → 42.2.0nvdUScpe:2.3:a:vercel:vercel:*:*:*:*:*:*:*:*
npm next15.3.0 → 15.3.3osvUSpkg:npm/next

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1456Vercel Next.js: Mehrere SchwachstellenDeutsch2025-07-03csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Vercel Next.js ausnutzen, um falsche Informationen darzustellen oder einen Denial of Service Zustand zu verursachen.
GHSA-r2fc-ccr8-96c4Next.js has a Cache poisoning vulnerability due to omission of the Vary header2025-07-03ghsa · osvUS
### Summary A cache poisoning issue in **Next.js App Router >=15.3.0 and < 15.3.3** may have allowed RSC payloads to be cached and served in place of HTML, under specific conditions involving middleware and redirects. This issue has been fixed in **Next.js 15.3.3**. Users on affected versions should **upgrade immediately** and **redeploy** to ensure proper caching behavior. More details: [CVE-2025-49005](https://vercel.com/changelog/cve-2025-49005)

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2025-07-03modified 2026-06-17

references (17)

External citations — patches, advisories, analysis.

scry

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