CVE-2026-27118— Cache poisoning in @sveltejs/adapter-vercel
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-27118
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Cache poisoning in @sveltejs/adapter-vercel
Source: NVD (National Vulnerability Database)
Vulnerability Description
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Versions of @sveltejs/adapter-vercel prior to 6.3.2 are vulnerable to cache poisoning. An internal query parameter intended for Incremental Static Regeneration (ISR) is accessible on all routes, allowing an attacker to cause sensitive user-specific responses to be cached and served to other users. Successful exploitation requires a victim to visit an attacker-controlled link while authenticated. Existing deployments are protected by Vercel's WAF, but users should upgrade as soon as possible. This vulnerability is fixed in 6.3.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
源验证错误
Source: NVD (National Vulnerability Database)
Vulnerability Title
SvelteKit 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SvelteKit是Svelte开源的一套Web 开发框架。 SvelteKit 6.3.2之前版本存在访问控制错误漏洞，该漏洞源于内部查询参数可访问，可能导致缓存投毒。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-27118
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-27118
Please Login to view more intelligence information
Same Patch Batch · sveltejs · 2026-02-20 · 5 CVEs total
| CVE-2026-27119 | Svelte affected by XSS in SSR `<option>` element | |
| CVE-2026-27125 | Svelte SSR attribute spreading includes inherited properties from prototype chain | |
| CVE-2026-27122 | Svelte SSR does not validate dynamic element tag names in `<svelte:element>` | |
| CVE-2026-27121 | Svelte affected by cross-site scripting via spread attributes in Svelte SSR |
IV. Related Vulnerabilities
Same product: kit
- CVE-2026-40074
SvelteKit's invalidated redirect in handle hook causes Denia - CVE-2026-40073
SvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter- - CVE-2026-22803
SvelteKit has a memory amplification DoS in Remote Functions - CVE-2025-67647
SvelteKit Denial of service and possible SSRF when using pre - CVE-2025-32388
SvelteKit allows XSS via tracked search_params
Same vendor: sveltejs
- CVE-2026-40074
SvelteKit's invalidated redirect in handle hook causes Denia - CVE-2026-40073
SvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter- - CVE-2026-30226
devalue has prototype pollution in devalue.parse and devalue - CVE-2026-27902
Svelte Vulnerable to XSS via HTML Comment Injection in SSR E - CVE-2026-27901
Svelte vulnerable to XSS during SSR with contenteditable `bi
Same weakness: CWE-346
- CVE-2026-6508
RCE in TUBITAK BILGEM's Liderahenk - CVE-2026-43870
Apache Thrift: Node.js web_server.js multi-vulnerability - CVE-2026-7439
AgentFlow Local Web API Content-Type Validation Bypass - CVE-2026-41398
OpenClaw - Unauthorized Agent Request Dispatch via Untrusted - CVE-2026-41393
OpenClaw < 2026.3.31 - Arbitrary DNS Authority Acceptance an
V. Comments for CVE-2026-27118
No comments yet