Vulnerability-Lookup

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

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

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 22 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	CPE status
Snowflake	Snowflake PHP PDO Driver	Affected: 3.2.0 , < 4.3.0 (semver)	guessed
Snowflake	Snowflake Libsnowflakeclient	Affected: 2.1.0 , < 2.11.1 (semver)	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-121925

Vulnerability from fkie_nvd - Published: 2026-11-04 12:17 - Updated: 2026-11-06 21:15

Severity

6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	412d305a-227d-44f9-a262-a31ba44f2aea	https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026
	412d305a-227d-44f9-a262-a31ba44f2aea	https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-CMV8-J38C-QHXX

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

Details

Severity

6.6 (Medium)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-121925"
  ],
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    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-04T12:17:06Z",
    "severity": "MODERATE"
  },
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  "id": "GHSA-cmv8-j38c-qhxx",
  "modified": "2026-11-04T12:31:33Z",
  "published": "2026-11-04T12:31:33Z",
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    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121925"
    },
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      "url": "https://docs.snowflake.com/en/release-notes/clients-drivers/php-pdo-2026#version-430-oct-1-2026"
    },
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      "url": "https://github.com/snowflakedb/libsnowflakeclient/releases/tag/v2.11.1"
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      "type": "CVSS_V3"
    }
  ]
}

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

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-121925

GHSA-CMV8-J38C-QHXX

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Vulnerability timeline

Related by attack behaviour