CVE-2026-77468 Missing authorization in Lychee
Unauthenticated access to API documentation allows attackers to map the API surface and cause denial of service via resource exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77468?
CVE-2026-77468 is a medium-severity missing authorization vulnerability in LycheeOrg Lychee, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2026-77468?
How do I fix CVE-2026-77468?
No fix has been published for CVE-2026-77468 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77468 being exploited?
There is no known exploitation of CVE-2026-77468 in the wild and no public exploit code.
Sources
Also known as GHSA-xg8r-4pm3-2h4f.