Medium severity · published Oct 22, 2026
CVE-2026-115333
Lotus through 0.10.2 Improper Authentication via Event Ingestion API Key Prefix
New
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LO
lotus · uselotus
through 0.10.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115333
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115333
github.com
https://github.com/uselotus/lotus
github.com
https://github.com/uselotus/lotus/blob/0.10.2/go/event-ingestion/authn/authn.go#L85-L95
hackmd.io
https://hackmd.io/@leediay/BkUc3WL2Mx
www.vulncheck.com
https://www.vulncheck.com/advisories/lotus-through-0.10.2-improper-authentication-via-event-ingestion-api-key-prefix
More from lotus
8.8
CVE-2026-115332
Lotus through 0.10.2 SQL Injection via Subscription Filter Keys
8.8
CVE-2026-115331
Lotus through 0.10.2 SQL Injection via Metric Property Names and Filters
8.8
CVE-2026-115330
Lotus through 0.10.2 SQL Injection via Custom SQL Billable Metrics
6.8
CVE-2026-115334
Lotus through 0.10.2 Authorization Bypass via switch_organization Endpoint
5.9
CVE-2026-115329
Lotus through 0.10.2 Cross-Organization IDOR via SubscriptionViewSet