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CVE-2026-79656— OAuth and OIDC tokens written unredacted to server logs by the Generic OAuth, Google and GitLab connectors

Quick assessment

Affected
Grafana Grafana OSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

任何能够读取 Grafana 服务器日志或日志存储目标（日志被发送到的位置）的用户，均可恢复通过通用 OAuth、Google 或 GitLab 提供商进行身份验证的用户的 OAuth 和 OIDC 访问令牌、刷新令牌及 ID 令牌。当访问令牌或 ID 令牌不是有效的 JWT、ID 令牌缺失（在调试级别下）或 ID 令牌不是字符串类型时，Grafana 会将这些令牌以未脱敏的形式写入日志（即敏感信息在日志文件中泄露）。该泄露范围受限于已配置的 OAuth 客户端所授予的权限范围（scopes）。

CVSS 6.0 · Medium

Affected Version Matrix 10

VendorProduct Version RangeStatus
Grafana Grafana Enterprise ≤ 12.3.11 affected
12.4.0< 12.4.11 affected
13.0.0< 13.0.9 affected
13.1.0< 13.1.6 affected
13.2.0< 13.2.2 affected
Grafana Grafana OSS ≤ 12.3.11 affected
12.4.0< 12.4.11 affected
13.0.0< 13.0.9 affected
13.1.0< 13.1.6 affected
13.2.0< 13.2.2 affected
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I. Basic Information for CVE-2026-79656

Vulnerability Information
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Vulnerability Title
OAuth and OIDC tokens written unredacted to server logs by the Generic OAuth, Google and GitLab connectors
Source: CVE Program / CVE List V5
Vulnerability Description
A user with read access to Grafana's server logs, or to a log store they are shipped to, can recover the OAuth and OIDC access, refresh and ID tokens of users who sign in through the Generic OAuth, Google or GitLab providers. Grafana writes these tokens to its logs unredacted when an access or ID token is not a valid JWT, when the ID token is missing (at debug level) or is not a string (exposure of sensitive information in log files). The exposure is bounded by the scopes granted to the configured OAuth client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Grafana Grafana OSS 0 ~ 12.3.11 -
Grafana Grafana Enterprise 0 ~ 12.3.11 -

II. Public POCs for CVE-2026-79656

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III. Intelligence Information for CVE-2026-79656

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Vendor Advisories for CVE-2026-79656 (1)

Same Patch Batch · Grafana · 2026-10-28 · 5 CVEs total

CVE-2026-103506 8.9 HIGH SSO settings authorization bypass
CVE-2026-100105 7.7 HIGH Alerting contact point authorization bypass via schema downgrade
CVE-2026-88967 7.7 HIGH Azure Monitor access token disclosure via SSRF
CVE-2026-88858 6.5 MEDIUM Server-side expression parser denial of service

IV. Related Vulnerabilities

Same product: Grafana OSS
Same vendor: Grafana
Same weakness: CWE-532