Unauthenticated database read/write via skipped SASL checks
Published Aug 18, 2026 · Updated Aug 18, 2026
Improper authentication in the MongoDB wire-protocol plugin in ArcadeDB before 26.8.1 allows remote attackers to read and write data via port 27017. MongoDBBackend.handleCommand authenticates only saslStart and saslContinue, then forwards insert, find, update, delete, and create commands without checking that the connection authenticated. Because the plugin never binds an authenticated principal to the channel or database context, ACL checks run with a null user and any reachable enabled MongoDB listener permits cross-database access.
Summary
What happened
Improper authentication in the MongoDB wire-protocol plugin in ArcadeDB before 26.8.1 allows remote attackers to read and write data via port 27017. MongoDBBackend.handleCommand authenticates only saslStart and saslContinue, then forwards insert, find, update, delete, and create commands without checking that the connection authenticated. Because the plugin never binds an authenticated principal to the channel or database context, ACL checks run with a null user and any reachable enabled MongoDB listener permits cross-database access.
The record
- CVE
- CVE-2026-75852
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Vendor
- Arcade Data
- Product
- ArcadeDB
- Classifications
- CWE-306, CWE-862, T1210
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 18, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 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.
- Affected versionversion=0 <26.8.1
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Vendor proof of concept in GHSA-fq9c-x968-g278proof of concept · demonstrated
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Technologies
Your stack
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Your stack
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