CVE-2026-63094
SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft
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.
INFO
Published Date :
July 17, 2026, 3:16 p.m.
Last Modified :
July 27, 2026, 6:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-63094
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update SigNoz to a non-vulnerable version.
- Disable SSO if immediate update is not possible.
- Review and restrict Google OAuth, SAML, and OIDC configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63094.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63094 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63094
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63094 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63094 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 27, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/SigNoz/signoz', 'vendor': 'SigNoz', 'product': 'signoz', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.133.0'}, {'status': 'unaffected', 'version': '253ca7dd7eb4f7a32a694c249eb0d5d0804d5619', 'versionType': 'git'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/SigNoz/signoz', 'vendor': 'SigNoz', 'product': 'signoz', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.134.0', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] Changed Description SigNoz through 0.133.0 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. 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. Added Reference https://github.com/SigNoz/signoz/releases/tag/v0.134.0 -
CVE Modified by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Reference https://github.com/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619 Added Reference https://github.com/SigNoz/signoz/pull/12172 Removed Reference https://github.com/SigNoz/signoz/pull/11844 Changed Affected [{'repo': 'https://github.com/SigNoz/signoz', 'vendor': 'SigNoz', 'product': 'signoz', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.133.0'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/SigNoz/signoz', 'vendor': 'SigNoz', 'product': 'signoz', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.133.0'}, {'status': 'unaffected', 'version': '253ca7dd7eb4f7a32a694c249eb0d5d0804d5619', 'versionType': 'git'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-63094', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-21T01:38:52.091051Z'} -
New CVE Received by [email protected]
Jul. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/SigNoz/signoz', 'vendor': 'SigNoz', 'product': 'signoz', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '0.133.0'}], 'defaultStatus': 'affected'}] Added Description SigNoz through 0.133.0 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CWE CWE-345 Added CWE CWE-601 Added Reference https://github.com/SigNoz/signoz/issues/11746 Added Reference https://github.com/SigNoz/signoz/pull/11844 Added Reference https://www.vulncheck.com/advisories/signoz-sso-oauth-state-manipulation-session-token-theft