GHSA-5cc2-282f-jjq2

Improper TLS hostname verification in Snowflake Connector for Python versions prior to 4.7.1 and 3.18.1 may have allowed a network-positioned attacker to bypass certificate hostname validation on HTTPS connections made by the connector. An attacker with on-path network access could exploit this by intercepting or redirecting network traffic and presenting a certificate signed by any trusted CA for any domain, causing the connector to accept connections without validating that the certificate matched the requested hostname. Successful exploitation requires an on-path traffic interception capability (e.g. ARP/DNS poisoning, rogue access point, BGP hijacking, or malicious proxy/exit node). This vulnerability may have exposed credentials, query data, and staged file contents to interception and tampering, and may have enabled the attacker to issue arbitrary SQL within the context of the victim's connector session. Impact is limited by the privileges of the affected Snowflake role. The fix is available in Snowflake Connector for Python versions 4.7.1 and 3.18.1. Users must manually upgrade.

Database specific

{
    "nvd_published_at": "2026-07-16T07:16:47Z",
    "github_reviewed_at": "2026-08-31T22:35:14Z",
    "severity": "CRITICAL",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-297"
    ]
}

References

Affected packages

PyPI / snowflake-connector-python

Package

Name: snowflake-connector-python; View open source insights on deps.dev
Purl: pkg:pypi/snowflake-connector-python

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.18.1

Affected versions

1.*

1.4.5

1.4.6

1.4.7

1.4.8

1.4.9

1.4.10

1.4.11

1.4.12

1.4.13

1.4.14

1.4.15

1.4.16

1.4.17

1.5.0

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5

1.6.6

1.6.7

1.6.8

1.6.9

1.6.10

1.6.11

1.6.12

1.7.0

1.7.1

1.7.2

1.7.3

1.7.4

1.7.5

1.7.6

1.7.7

1.7.8

1.7.9

1.7.10

1.7.11

1.8.0

1.8.1

1.8.2

1.8.3

1.8.4

1.8.5

1.8.6

1.8.7

1.9.1

2.*

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.1.0

2.1.1

2.1.2

2.1.3

2.2.0

2.2.1

2.2.2

2.2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.2.8

2.2.9

2.2.10

2.3.0

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.3.8

2.3.9

2.3.10

2.4.0

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5

2.4.6

2.5.0

2.5.1

2.6.0

2.6.1

2.6.2

2.7.0

2.7.1

2.7.2

2.7.3

2.7.4

2.7.5

2.7.6

2.7.7

2.7.8

2.7.9

2.7.10

2.7.11

2.7.12

2.8.0

2.8.1

2.8.2

2.8.3

2.9.0

3.*

3.0.0

3.0.1

3.0.2

3.0.3

3.0.4

3.1.0a1

3.1.0a2

3.1.0

3.1.1

3.2.0

3.2.1

3.3.0b1

3.3.0

3.3.1

3.4.0

3.4.1

3.5.0

3.6.0

3.7.0

3.7.1

3.8.0

3.8.1

3.9.0

3.9.1

3.10.0

3.10.1

3.11.0

3.12.0

3.12.1

3.12.2

3.12.3

3.12.4

3.13.0

3.13.1

3.13.2

3.14.0

3.14.1

3.15.0

3.16.0

3.17.0

3.17.1

3.17.2

3.17.3

3.17.4

3.18.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-5cc2-282f-jjq2/GHSA-5cc2-282f-jjq2.json"

PyPI / snowflake-connector-python

Package

Name: snowflake-connector-python; View open source insights on deps.dev
Purl: pkg:pypi/snowflake-connector-python

Affected ranges

Type: ECOSYSTEM
Events: Introduced

4.0.0

Fixed

4.7.1

Affected versions

4.*

4.0.0

4.1.0

4.1.1

4.2.0

4.3.0

4.4.0

4.5.0

4.6.0

4.7.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-5cc2-282f-jjq2/GHSA-5cc2-282f-jjq2.json"