CVE-2018-3826

In Elasticsearch versions 6.0.0-beta1 to 6.2.4 a disclosure flaw was found in the _snapshot API. When the access_key and security_key parameters are set using the _snapshot API they can be exposed as plain text by users able to query the _snapshot API.

Published: 2018-09-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-3826 is rated Moderate Risk (43/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.69%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-3826

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.40% 0.69% +0.29%
2 2026-03-04 0.24% 0.40% +0.16%
3 2026-03-01 — 0.24% —

Full EPSS history (34 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-3826

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2018-3826

OS Trackers for CVE-2018-3826

vendor priority summary link
suse medium CVE-2018-3826 severity moderate: SUSE including 1 source package names (elasticsearch), 4 product×package rows across 4 product lines (HPE Helion OpenStack 8, SUSE OpenStack Cloud 7, SUSE OpenStack Cloud 8, SUSE OpenStack Cloud Crowbar 8): Known Not Affected 4. https://www.suse.com/security/cve/CVE-2018-3826/
ubuntu medium CVE-2018-3826 medium priority: Ubuntu including 1 source packages (elasticsearch), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): DNE 3, not-affected 1, released 1. https://ubuntu.com/security/CVE-2018-3826

Affected software / configurations for CVE-2018-3826

Vendor Product Version Raw CPE
elastic elasticsearch >= 6.0.0, <= 6.2.4 cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*
elastic elasticsearch 6.0.0 cpe:2.3:a:elastic:elasticsearch:6.0.0:beta1:*:*:*:*:*:*

References for CVE-2018-3826

cvelogic Threat Intelligence