Vulnerability-Lookup

GHSA-CMV8-J38C-QHXX

Vulnerability from github – Published: 2026-11-04 12:31 – Updated: 2026-11-04 12:31

Details

A stack-based buffer overflow in libsnowflakeclient and the Snowflake PHP PDO Driver could, under specific conditions, result in memory corruption during SAML-based authentication. During a native SSO/SAML login flow, the affected drivers may have copied a value taken from the identity provider's HTML response into a fixed-size memory buffer without first validating the length of that value. An attacker who controlled or had compromised the configured identity provider — or who was able to redirect the SAML single sign-on endpoint to an attacker-controlled server — might have leveraged this by returning an oversized response, potentially resulting in a crash or, in specific circumstances, remote code execution within the context of the application running the library. The fix is available in libsnowflakeclient version 2.11.1 and Snowflake PHP PDO Driver version 4.3.0. Users must manually upgrade.

Severity

6.6 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-121925"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-04T12:17:06Z",
    "severity": "MODERATE"
  },
  "details": "A stack-based buffer overflow in libsnowflakeclient and the Snowflake PHP PDO Driver could, under specific conditions, result in memory corruption during SAML-based authentication. During a native SSO/SAML login flow, the affected drivers may have copied a value taken from the identity provider\u0027s HTML response into a fixed-size memory buffer without first validating the length of that value. An attacker who controlled or had compromised the configured identity provider \u2014 or who was able to redirect the SAML single sign-on endpoint to an attacker-controlled server \u2014 might have leveraged this by returning an oversized response, potentially resulting in a crash or, in specific circumstances, remote code execution within the context of the application running the library. The fix is available in libsnowflakeclient version 2.11.1 and Snowflake PHP PDO Driver version 4.3.0. Users must manually upgrade.",
  "id": "GHSA-cmv8-j38c-qhxx",
  "modified": "2026-11-04T12:31:33Z",
  "published": "2026-11-04T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121925"
    },
    {
      "type": "WEB",
      "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-121925 (GCVE-0-2026-121925)

Vulnerability from cvelistv5 – Published: 2026-11-04 11:28 – Updated: 2026-11-04 20:00

Title

Buffer overflow in SAML authentication post-back URL handling in libsnowflakeclient and Snowflake PHP PDO Driver

Summary

Severity

6.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-04 18:20 UTC

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

SNOWFLAKE CNA

CNA scorecard C 65/100 over 21 records in the last 180 days details

References

2 references

URL	Tags
https://docs.snowflake.com/en/release-notes/clien…
https://github.com/snowflakedb/libsnowflakeclient…

Impacted products

2 products

Vendor	Product	Version
Snowflake	Snowflake PHP PDO Driver	Affected: 3.2.0 , < 4.3.0 (semver)
Snowflake	Snowflake Libsnowflakeclient	Affected: 2.1.0 , < 2.11.1 (semver)

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JSON

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-121925",
                "options": [
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                  },
                  {
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-04T18:20:10.577872Z",
                "version": "2.0.3"
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      "metrics": [
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            "confidentialityImpact": "HIGH",
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    "dateReserved": "2026-11-04T11:24:43.550Z",
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    "state": "PUBLISHED"
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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.

Vulnerability timeline

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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.
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