VulnSocial

CVE-2026-27902Disclosure(svelte / svelte)

LOWCVSS 5.4 · MEDIUM

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output, causing potential HTML injection and XSS if attacker-controlled content is returned from `transformError`. Version 5.53.5 fixes the issue.

svelte CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • svelte

Threat summary

  • 3 mentions across 1 observed day

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • 3 total mentions across 1 day

Affected systems

Vendors
svelte
Products
svelte

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-02-26: 3Technical Details · 2026-02-26: 302-26
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Full discourse3 posts
  • cvereports@_cvereports
    Disclosure

    CVE-2026-27902: Svelte 5 SSR XSS: When JSON Met HTML Comments A Cross-Site Scripting (XSS) vulnerability exists in Svelte 5 versions prior to 5.53.5. The flaw occurs during Server-Side Rendering (SSR) when the framework attempts to serialize error obj... https://cvereports.com/reports/CVE-2026-27902

    Post summary

    The report discloses an XSS flaw in Svelte 5 SSR before version 5.53.5, detailing the vulnerability type and affected versions, but does not provide a PoC, exploit, or patch information.

    0000046
    32 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27902 Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output… https://www.cve.org/CVERecord?id=CVE-2026-27902

    Post summary

    The CVE describes an unescaped error injection vulnerability in Svelte's transformError function before version 5.53.5, potentially leading to XSS.

    00000128
    56.6K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-27902 HTML Injection Vulnerability in Svelte Web Framework Prior to 5.53.5 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27902

    Post summary

    A new HTML injection vulnerability (CVE-2026-27902) affecting Svelte Web Framework versions prior to 5.53.5 has been disclosed.

    0000031
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appsveltesvelte-node.js-

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