CVE-2026-52843

Summary

Lightpanda is a headless browser designed for AI and automation. Prior to 0.2.9, Lightpanda fetch() and XMLHttpRequest unconditionally attached session cookies to every HTTP request, ignoring credentials: omit, credentials: same-origin, credentials: include, and XMLHttpRequest.withCredentials, allowing an attacker-controlled origin in a Lightpanda session to issue authenticated cross-origin requests against a victim origin. This issue is fixed in version 0.2.9.

Affected Software

Weaknesses

• CWE-346: CWE-346: Origin Validation Error

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc
• https://github.com/lightpanda-io/browser/pull/2155
• https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76
• https://github.com/lightpanda-io/browser/releases/tag/0.2.9

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