CVE-2026-27118Patch

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-346

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-02-20); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-02-20: 1Mentions · 2026-02-21: 1Patch / Workaround · 2026-02-20: 1Technical Details · 2026-02-21: 102-2002-21
Signal classification2 categories
Patch
150.0%
Disclosure
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-02-201
Patch1
2026-02-211
Disclosure1
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-27118 Cache Poisoning Vulnerability in SvelteKit Vercel Adapter Before 6.3.2 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27118

    Post summary

    The post cites a cache poisoning vulnerability in SvelteKit’s Vercel Adapter before version 6.3.2 and provides a link to additional details.

    0000037
    4.0K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-27118 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 t… https://www.cve.org/CVERecord?id=CVE-2026-27118

    Post summary

    CVE-2026-27118 affects older @sveltejs/adapter-vercel releases; upgrading to version 6.3.2 resolves the issue.

    0000091
    56.4K followersView on X

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