CVE-2026-115333
CVE-2026-115333
Lotus through 0.10.2 contains an improper authentication vulnerability in the Go event ingestion middleware that validates API keys by prefix only, without checking the secret against the stored hashed_key. Attackers who know or obtain an API key prefix can submit usage events to POST /api/track/ as that organization, altering its metered usage and billing.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- hackmd.io/@leediay/BkUc3WL2Mx (technical-description)
- github.com/uselotus/lotus/blob/0.10.2/go/event-ingestion/authn/authn.go (technical-description)
- github.com/uselotus/lotus (product)
- www.vulncheck.com/advisories/lotus-through-0.10.2-improper-authentication-via-e… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-115333?
- CVE-2026-115333 is a medium-severity vulnerability, classified under Improper Authentication. CVSS score: 5.9/10. Published 2026-10-22.
- How severe is CVE-2026-115333?
- Medium severity. CVSS v3 base score is 5.9 out of 10.