What is CVE-2026-13512?
A vulnerability was identified in Databend up to 1.2.881 on HTTP. This affects the function ClientSessionManager::state_key of the file src/query/service/src/servers/http/v1/session/client_session_manager.rs of the component Tenant Handler. The manipulation leads to authorization bypass. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance.
The record classifies CVE-2026-13512 under weakness classes CWE-639, CWE-285. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 99 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 6.3 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R - CVSS v4.0 base score
- 5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - EPSS (FIRST)
- 0.2% probability of exploitation in the next 30 days, higher than 12.4% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-06-28
Is CVE-2026-13512 being exploited?
It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.
Affected products and versions
- (vendor unspecified): Databend
How to fix CVE-2026-13512
No vendor patch reference has been recorded for CVE-2026-13512 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-13512
No threat campaign in the Threadlinqs corpus currently references CVE-2026-13512, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.
Sources
Enriched from CVE.org, GitHub Security Advisories, FIRST EPSS. Last verified by Threadlinqs on .