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CVE-2026-63094— SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft

Quick assessment

Affected
SigNoz signoz
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SigNoz SigNoz是SigNoz团队的一款开源应用性能监控工具。 SigNoz 0.133.0及之前版本存在输入验证错误漏洞，该漏洞源于SSO身份验证流程中存在开放重定向漏洞，可能导致未经身份验证的攻击者在配置了Google OAuth、SAML或OIDC的实例上窃取任何用户的会话令牌。攻击者可以通过未经验证的sessions context endpoint，使用指向攻击者主机的ref参数调用，向受害者提供特制的登录URL，并在受害者完成SSO身份验证时接收其访问令牌和刷新令牌。

CVSS 8.1 · High EPSS 0.26% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
SigNoz signoz < 0.134.0 affected
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I. Basic Information for CVE-2026-63094

Vulnerability Information
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Vulnerability Title
SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft
Source: CVE Program / CVE List V5
Vulnerability Description
SigNoz before 0.134.0 contains an open redirect vulnerability in the SSO authentication flow that allows unauthenticated attackers to steal session tokens from any user on instances configured with Google OAuth, SAML, or OIDC. Attackers can call the unauthenticated sessions context endpoint with a ref parameter pointing to an attacker-controlled host, deliver the resulting crafted login URL to a victim, and receive the victim's access and refresh tokens when they complete SSO authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
SigNoz 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SigNoz SigNoz是SigNoz团队的一款开源应用性能监控工具。 SigNoz 0.133.0及之前版本存在输入验证错误漏洞，该漏洞源于SSO身份验证流程中存在开放重定向漏洞，可能导致未经身份验证的攻击者在配置了Google OAuth、SAML或OIDC的实例上窃取任何用户的会话令牌。攻击者可以通过未经验证的sessions context endpoint，使用指向攻击者主机的ref参数调用，向受害者提供特制的登录URL，并在受害者完成SSO身份验证时接收其访问令牌和刷新令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SigNoz signoz 0 ~ 0.134.0 -

II. Public POCs for CVE-2026-63094

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8436 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-63094

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Patches & Fixes for CVE-2026-63094 (3)

Vendor Advisories for CVE-2026-63094 (1)

Vendor Pages for CVE-2026-63094 (1)

Other References for CVE-2026-63094 (1)

IV. Related Vulnerabilities

Same product: signoz
Same vendor: SigNoz
Same weakness: CWE-601

V. Comments for CVE-2026-63094

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