fix(deps): update dependency next to v15 [security]#508
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This PR contains the following updates:
14.2.35→15.5.16Next.js HTTP request deserialization can lead to DoS when using insecure React Server Components
GHSA-h25m-26qc-wcjf
More information
Details
A vulnerability affects certain React Server Components packages for versions 19.0.x, 19.1.x, and 19.2.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23864.
A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage, out-of-memory exceptions, or server crashes. This can result in denial of service in unpatched environments.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Next.js has a Denial of Service with Server Components
GHSA-q4gf-8mx6-v5v3
More information
Details
A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23869. You can read more about this advisory our this changelog.
A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage. This can result in denial of service in unpatched environments.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Next.js Vulnerable to Denial of Service with Server Components
GHSA-8h8q-6873-q5fj
More information
Details
A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23870.
A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage. This can result in denial of service in unpatched environments.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Next.js has a Middleware / Proxy bypass in Pages Router applications using i18n
CVE-2026-44573 / GHSA-36qx-fr4f-26g5
More information
Details
Impact
Applications using the Pages Router with
i18nconfigured and middleware/proxy-based authorization can allow unauthorized access to protected page data through locale-less/_next/data/<buildId>/<page>.jsonrequests. In affected configurations, middleware does not run for the unprefixed data route, allowing an attacker to retrieve SSR JSON for protected pages without passing the intended authorization checks.Fix
The matcher logic was updated to perform the same match as it would on a non-i18n data route.
Workarounds
If you cannot upgrade immediately, enforce authorization in the page's server-side data path instead of relying solely on middleware.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Next.js vulnerable to server-side request forgery in applications using WebSocket upgrades
CVE-2026-44578 / GHSA-c4j6-fc7j-m34r
More information
Details
Impact
Self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected.
Fix
We now apply the same safety checks to WebSocket upgrade handling that already existed for normal HTTP requests, so upgrade requests are only proxied when routing has explicitly marked them as safe external rewrites.
Workarounds
If you cannot upgrade immediately, do not expose the origin server directly to untrusted networks. If WebSocket upgrades are not required, block them at your reverse proxy or load balancer, and restrict origin egress to internal networks and metadata services where possible.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
vercel/next.js (next)
v15.5.16Compare Source
v15.5.15Compare Source
Please refer the following changelogs for more information about this security release:
https://vercel.com/changelog/summary-of-cve-2026-23869
v15.5.14Compare Source
v15.5.13Compare Source
v15.5.12Compare Source
This is a re-release of v15.5.11 applying the turbopack changes.
v15.5.11Compare Source
Core Changes
Credits
Huge thanks to @timneutkens, @mischnic, @ztanner, and @wyattjoh for helping!
v15.5.10Compare Source
Please refer the following changelogs for more information about this security release:
v15.5.9Compare Source
v15.5.8Compare Source
v15.5.7Compare Source
v15.5.6Compare Source
Core Changes
Credits
Huge thanks to @mischnic for helping!
v15.5.5Compare Source
Core Changes
experimental.middlewareClientMaxBodySizebody cloning limit (#84722)Misc Changes
Credits
Huge thanks to @devjiwonchoi, @ztanner, and @icyJoseph for helping!
v15.5.4Compare Source
Core Changes
Misc Changes
Credits
Huge thanks to @yiminghe, @huozhi, @devjiwonchoi, @mischnic, @lukesandberg, @ztanner, @icyJoseph, @leerob, @fufuShih, @dwrth, @aymericzip, @obendev, @molebox, @OoMNoO, @pontasan, @styfle, @HondaYt, @ryuapp, @lpalmes, and @ijjk for helping!
v15.5.3Compare Source
Core Changes
Credits
Huge thanks to @bgub for helping!
v15.5.2Compare Source
Core Changes
Credits
Huge thanks to @bgub and @ztanner for helping!
v15.5.1Compare Source
Core Changes
Credits
Huge thanks to @bgub, @mischnic, and @ztanner for helping!
v15.5.0Compare Source
Core Changes
@typescript-eslint/switch-exhaustiveness-checkrule: #81583React.unstable_postpone(): #81652images.qualitiesis undefined: #81690pprordynamicIOenabled: #81668__turbopack_load_by_url__: #8166397cdd5d3-20250710to2f0e7e57-20250715: #81678renderToStringfunction: #817072f0e7e57-20250715tod85ec5f5-20250716: #81708next-serverVM: #81664headers/cookies/draftModein'use cache': #81716d85ec5f5-20250716todffacc7b-20250717: #81767getExpectedRequestStorefunction: #81791.next/cache: #81807dffacc7b-20250717toe9638c33-20250721: #81899'use cache: private': #81816browserslist: #81851run-turbopack-compilertrace span: #81917e9638c33-20250721to7513996f-20250722: #819407513996f-20250722toedac0dde-20250723: #81984exhaustive-depsviolations: #82010edac0dde-20250723to3d14fcf0-20250724: #820203d14fcf0-20250724to19baee81-20250725: #8206319baee81-20250725toeaee5308-20250728: #82120eaee5308-20250728to9be531cd-20250729: #82159@next/codemod: update docs url in README: #82135@next/codemod: Addexperimental.turbototurbopackcodemod for Next.js configs: #82134NextRequesttypes: #821729be531cd-20250729to9784cb37-20250730: #82207TURBOPACKenv before loading config: #82162outputFileTracingRootorturbopack.rootoption is provided: #821649784cb37-20250730toc260b38d-20250731: #82247eslint-plugin-react-hooksin React sync: #82294c260b38d-20250731tobe11cb5c-20250804: #82339_errorpage'sreq.urlcan be overwritten to dynamic param on minimal mode: #82347asPathfor query-only navigation withuseRouter: #82236?dplto fonts in/_next/static/media: #82384be11cb5c-20250804to7deda941-20250804: #82373pathto Image documentation: #823297deda941-20250804to3958d5d8-20250807: #824473958d5d8-20250807tof1e70b5e-20250811: #82534f1e70b5e-20250811toac7820a9-20250811: #82543image-sizepkg as additional format detector: #82538?dplto fonts in/_next/static/mediapart 2: #82488componentStackFramesfield: #82395skipMetadata: #82569ac7820a9-20250811to1dc3bdea-20250812: #82575Mapsupport fromnext/dynamictransform: #82487window.next.turbopackinstead: #825801dc3bdea-20250812tof1222f76-20250812: #82595f1222f76-20250812to379a083b-20250813: #82642turbo_tasks::spawn: #82634379a083b-20250813toa96a0f39-20250815: #82691turbopack.rootvalue foroutputFileTracingRootto have consistent tracing root: #82653Example Changes
with-supabaseexample to usegetClaims(): #81383Misc Changes
beforePageLoadto be async: #81650ImportedBindingeffect creation to avoid as much special-casing of SimpleAssignTarget: #81653use-cachetest suite in the Cache Components tests: #81610app-staticdeploy test: #81712Configuration
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