What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-28
• Weakness: CWE-770

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.

Affected products

• LycheeOrg Lychee: before 7.7.0

References

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

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