CVE-2026-77468CWE-770denial-of-service

CVE-2026-77468

published October 15, 2026

CVSS
6.9
EPSS
0%
Percentile
29.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
6.9 · NONE
CVSS v4.0
6.9 · 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
EPSS
0.00371 · 29.8th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-15T21:17Z
References (4)
https://github.com/LycheeOrg/Lychee/commit/711f4290f53cd980cd5baa2434c734d364e9fe33 · [email protected]https://github.com/LycheeOrg/Lychee/pull/4510 · [email protected]https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0 · [email protected]https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-xg8r-4pm3-2h4f · [email protected]
EPSS history
Timeline
  • 17 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 15 OCT 16:35Z
    Lychee: Missing Authentication for Critical Function and Allocation of Resources Without Limits or Throttling on /docs/api
    cvelistv5
  • 15 OCT 16:35Z
    Lychee: Missing Authentication for Critical Function and Allocation of Resources Without Limits or Throttling on /docs/api
    cvelistv5