CVE-2026-85528Network attack vectorHinoki check available

Credential theft via unvalidated auto-configuration account value

Published Sep 4, 2026 · Updated Sep 4, 2026

Improper input validation in Snowflake JDBC Driver 4.2.0 through 4.3.3 allows attackers to steal credentials via a crafted account value. The auto-configuration path interpolates an unvalidated account identifier into the synthesized URL authority, redirecting the credential-bearing login request to an attacker-selected HTTPS endpoint. Exploitation requires jdbc:snowflake:auto, a connections.toml section without an explicit host, and a lower-trust principal able to set the account value; ordinary JDBC URLs are unaffected.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper input validation in Snowflake JDBC Driver 4.2.0 through 4.3.3 allows attackers to steal credentials via a crafted account value. The auto-configuration path interpolates an unvalidated account identifier into the synthesized URL authority, redirecting the credential-bearing login request to an attacker-selected HTTPS endpoint. Exploitation requires jdbc:snowflake:auto, a connections.toml section without an explicit host, and a lower-trust principal able to set the account value; ordinary JDBC URLs are unaffected.

The record

CVE
CVE-2026-85528
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
Snowflake
Product
Snowflake JDBC Driver
Classifications
CWE-918, CWE-20, T1550
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2.0 <4.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Snowflake · Snowflake JDBC Driverversion=4.2.0 <4.3.4

Published CVSS scores

5.3SnowflakeCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-20Improper Input Validation
T1550Use Alternate Authentication Material

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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