CVE-2026-77468: Lychee OpenAPI documentation exposure in /docs/api

CVE-2026-77468 · Severity: info · Published 2026-10-15

Lychee is an open-source photo management application. Before version 7.7.0, the API documentation endpoint at GET /docs/api was accessible to unauthenticated users and was generated on-demand without caching, allowing an attacker to repeatedly request it and consume server CPU resources while mapping the complete API surface and parameters.

Technologies: LycheeOrg Lychee. Vendors: LycheeOrg.

Quick answers

Is CVE-2026-77468 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-77468 being exploited in the wild.
How severe is CVE-2026-77468?
Informational severity, published 15 October 2026.
Which products and versions are affected?
LycheeOrg Lychee before 7.7.0.
Is there a fix for CVE-2026-77468?
Yes: fixed in 7.7.0. Until then: Restrict network access to the GET /docs/api endpoint using a reverse proxy or firewall until upgrading to version 7.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-77468 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-77468?
Check whether you run LycheeOrg Lychee at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 7.7.0

Restrict network access to the GET /docs/api endpoint using a reverse proxy or firewall until upgrading to version 7.7.0.

Technical details

The vulnerability exposes an unauthenticated, unthrottled route that dynamically generates Scramble-based OpenAPI schema documentation, serving it without application-level caching. Remote attackers can exhaust server CPU by repeated requests and obtain a complete enumeration of API endpoints and parameter schemas. The fix in 7.7.0 adds middleware to restrict access and implements caching to prevent regeneration on each request.

Affected products

  • LycheeOrg Lychee before 7.7.0

Timeline

  • 2026-10-15: disclosed
  • 2026-07-13: patched

References

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