Vulnerability-Lookup

GHSA-XMW5-W4C2-CP2G

Vulnerability from github – Published: 2026-07-17 15:32 – Updated: 2026-07-27 18:31

Details

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.

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

7.6 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63094"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-17T15:16:47Z",
    "severity": "HIGH"
  },
  "details": "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\u0027s access and refresh tokens when they complete SSO authentication.",
  "id": "GHSA-xmw5-w4c2-cp2g",
  "modified": "2026-07-27T18:31:26Z",
  "published": "2026-07-17T15:32:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63094"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SigNoz/signoz/issues/11746"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SigNoz/signoz/pull/11844"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SigNoz/signoz/pull/12172"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SigNoz/signoz/releases/tag/v0.134.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/signoz-sso-oauth-state-manipulation-session-token-theft"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-63094 (GCVE-0-2026-63094)

Vulnerability from cvelistv5 – Published: 2026-07-17 14:22 – Updated: 2026-07-27 17:17 X_Open Source

Title

SigNoz < 0.134.0 SSO OAuth State Manipulation Session Token Theft

Summary

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.

Severity

7.6 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-21 01:38 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CWE-345 - Insufficient Verification of Data Authenticity

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/SigNoz/signoz/issues/11746	technical-descriptionexploit
https://github.com/SigNoz/signoz/releases/tag/v0.134.0	release-notes
https://github.com/SigNoz/signoz/pull/12172	issue-tracking
https://github.com/SigNoz/signoz/commit/253ca7dd7…	patch
https://www.vulncheck.com/advisories/signoz-sso-o…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
SigNoz	signoz	Affected: 0 , < 0.134.0 (semver)

Date Public

2026-06-16 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-63094",
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                "timestamp": "2026-07-21T01:38:52.091051Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-XMW5-W4C2-CP2G

CVE-2026-63094 (GCVE-0-2026-63094)

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