Covered by FixVibemedium

ZXCVVAKATAWASEWASEGI0. Na cala ni ulutaga ni veitaqomaki ena tarava.config.js ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE1 Na sala sega ni dodonu ni veiganiti ena tarava.config.js e rawa ni biuta na sala ni Next.js sega ni taqomaki mai na ulutaga ni veitaqomaki, ka vakavuna na kiliki kei na vakatakilai ni itukutuku. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE2. Next.js na kerekere ni vakayagataki ni tarava.config.js me baleta na kena cicivaki na ulutaga e rawarawa ki na veitaqomaki ni veitaqomaki kevaka e sega ni dodonu na ivakarau ni sala-veiganiti. Na vakadidike oqo e vakadikeva na sala e vakavuna kina na cala ni wildcard kei na regex na yali ni ulutaga ni veitaqomaki ena sala vakaitamera kei na sala me vakakaukauwataki kina na veivakadeitaki. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE3. ## Veivakaleqai ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE4. Na ulutaga ni veitaqomaki e yali e rawa ni vakayagataki me vakayacori kina na clickjacking, volavola ni kauveilatai (ZXCVFIXVIBETOKEN4ZXCV), se soqona na itukutuku me baleta na vanua ni veiqaravi ZXCVFIXVIBETOKEN2ZXCV. Ni sa vakayagataki vakatawadodonu na ulutaga me vaka na Next.js (ZXCVFIXVIBETOKEN5ZXCV) se ZXCVFIXVIBETOKEN1ZXCV ena veisala kecega, e rawa ni ra taketetaka na dauvakacaca na sala sega ni taqomaki vakatabakidua me ra vakawalena na veitaqomaki ni vanua raraba ZXKCVFIXVIXVIX. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEGA5. ## Vuna ZXCVVAKATAWASEWASEI ZXCVVAKAVUVULI6. ZXCVFIXVIBETOKEN4ZXCV e vakatara vei ira na dauvakatorocaketaka me ra vakarautaka na ulutaga ni isau ena Next.js ena kena vakayagataki na iyau ZXCVFIXVIBETOKEN2ZXCV. Na ituvatuva oqo e vakayagataka na sala ni veiganiti e tokona na wildcards kei na vosa tudei ZXCVFIXVIBETOKEN3ZXCV. Na malumalumu ni veitaqomaki ka dau basika mai: ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE77. 1. Sega ni taucoko na sala ni veivakadeitaki: Na ivakarau ni Wildcard (me vaka, Next.js) ena sega ni rawa ni kovuta na veisala lalai kece e vakarautaki, ka biuta na draunipepa nested ka sega na ulutaga ni veitaqomaki ZXCVFIXVIBETOKEN1ZXCV. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEG8. 2. Vakatakilai ni itukutuku: Ena kena ivakarau, ZXCVFIXVIBETOKEN3ZXCV e rawa ni okati kina na ulutaga ni Next.js, ka vakaraitaka na ituvatuva ni ituvatuva vakavo ga ke vakamacalataki vakamatata ena sala ni ZXCVFIXVIBETOKEN1ZXTO ZXKCVENZFIXVIXVIBE. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASE9. 3. ZXCVFIXVIBETOKEN3ZXCV cala ni vakarautaki: Na ulutaga ni Next.js ena loma ni ituvatuva ni ZXCVFIXVIBETOKEN1ZXCV e rawa ni vakatara na sega ni vakadonui na kauveilatai-ivurevure ni curu ki na itukutuku bibi ZXCVFIXVIXCVBETOKEN. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI10 ## Vakavinakataki ni simede ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI11 - Na ivakarau ni sala ni vakadidike: Vakadeitaka na ivakarau kece ni Next.js ena ZXCVFIXVIBETOKEN1ZXCV vakayagataka na veivakadeitaki veiganiti (e.g., ZXCVFIXVIBETOKEN2ZXCV) me vakayagataki kina na ulutaga e vuravura raraba ena vanua e gadrevi kina ZXKCVZFIX3. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI12 - Vakacacana na ivakatakilakila ni iqaqalo: Vakarautaka na Next.js ena ZXCVFIXVIBETOKEN1ZXCV me tarova na ulutaga ni ZXCVFIXVIBETOKEN2ZXCV mai na kena vakau na ZXCVFIXVIBETOKEN3ZXCV. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI13 - Vakatabui na ZXCVFIXVIBETOKEN3ZXCV: Vakarautaka na Next.js ki na veivanua nuitaki vakatabakidua ka sega ni wildcards ena ZXCVFIXVIBETOKEN1ZXCV ni veivakadeitaki ZXCVFIXVIBETOKEN2ZXCV. ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI14 ## Na sala e vakatovolei kina ZXCVVAKATAWASEWASEI ZXCVVAKATAWASEWASEI15 ZXCVFIXVIBETOKEN3ZXCV e rawa ni vakayacora e dua na vakadidike gated gugumatua ena kena vakacurumi na kerekere ka vakatauvatani na ulutaga ni veitaqomaki ni veisala duidui. Ena kena vakadikevi na ulutaga ni Next.js kei na kena tudei na ZXCVFIXVIBETOKEN1ZXCV ena veimataqali titobu ni sala, e rawa ni kilai na ZXCVFIXVIBETOKEN4ZXCV na veivakarautaki ni veivakarautaki ena ZXCVFIXVIBETOKEN2ZXCV.

Next.js applications using next.config.js for header management are susceptible to security gaps if path-matching patterns are imprecise. This research explores how wildcard and regex misconfigurations lead to missing security headers on sensitive routes and how to harden the configuration.

CWE-1021CWE-200

Impact

Missing security headers can be exploited to perform clickjacking, cross-site scripting (XSS), or gather information about the server environment [S2]. When headers such as Content-Security-Policy (CSP) or X-Frame-Options are inconsistently applied across routes, attackers can target specific unprotected paths to bypass site-wide security controls [S2].

Root Cause

Next.js allows developers to configure response headers in next.config.js using the headers property [S2]. This configuration uses path matching that supports wildcards and regular expressions [S2]. Security vulnerabilities typically arise from:

Incomplete Path Coverage: Wildcard patterns (e.g., /path*) may not cover all intended subroutes, leaving nested pages without security headers [S2].
Information Disclosure: By default, Next.js may include the X-Powered-By header, which reveals the framework version unless explicitly disabled via the poweredByHeader configuration [S2].
CORS Misconfiguration: Improperly defined Access-Control-Allow-Origin headers within the headers array can allow unauthorized cross-origin access to sensitive data [S2].

Concrete Fixes

Audit Path Patterns: Ensure all source patterns in next.config.js use appropriate wildcards (e.g., /:path*) to apply headers globally where necessary [S2].
Disable Fingerprinting: Set poweredByHeader: false in next.config.js to prevent the X-Powered-By header from being sent [S2].
Restrict CORS: Set Access-Control-Allow-Origin to specific trusted domains rather than wildcards in the headers configuration [S2].

How FixVibe tests for it

FixVibe could perform an active gated probe by crawling the application and comparing the security headers of various routes. By analyzing the X-Powered-By header and the consistency of Content-Security-Policy across different path depths, FixVibe can identify configuration gaps in next.config.js.