What’s Vulnerable › Vulnerabilities

CVE-2026-116066: Firecrawl before 2.11.586 SSRF Protection Bypass via DNS Rebinding in Playwright Service

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-25 · updated 2026-10-29
• Weakness: CWE-918

Description

Firecrawl before 2.11.586 contains a server-side request forgery vulnerability in the Playwright service SSRF proxy that allows attackers to bypass isInternalHost checks via DNS rebinding. Attackers controlling DNS for a scrape target can return a public address during validation and a private address at connect time, retrieving cloud metadata and internal resources through the scrape API.

Affected products

• Firecrawl: before 2.11.586 — fixed in 2.11.586

How to fix

Upgrade to a fixed version: Firecrawl 2.11.586. Check the vendor advisory for mitigations.

References

• https://github.com/firecrawl/firecrawl
• https://github.com/firecrawl/firecrawl/blob/5c198a7d9376fef21a7f6d74313fc957842744ad/apps/playwright-service-ts/api.ts#L47-L117
• https://github.com/firecrawl/firecrawl/commit/5e74ff37b41ac650d6bccff170a9be0a6decb946
• https://github.com/firecrawl/firecrawl/issues/5256
• https://www.vulncheck.com/advisories/firecrawl-before-2.11.586-ssrf-protection-bypass-via-dns-rebinding-in-playwright-service
• https://github.com/firecrawl/firecrawl/issues/5256

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