According to Security NEXT, MongoDB's zlib implementation contains vulnerability CVE-2025-14847, which may allow external actors to read uninitialized server heap memory [1]. Attackers with network access to a MongoDB Server can exploit the flaw without authentication, potentially exposing credentials, tokens, API keys, and database contents [1]. Referred to as 'MongoBleed' by some researchers, the report urged prompt remediation and did not confirm any specific victim organizations in the cited passages [1].
This event has not been officially confirmed. Content is based on media or third-party reports.
Backfill: this event became public on Dec 29, 2025 and we added it on Nov 10, 2026. It is not a new event.
MongoDB 'MongoBleed' Vulnerability May Allow Unauthenticated Reading of Server Memory
1 min read
- Disclosed
- Dec 29, 2025
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- 83.2%, higher than 100% of CVEs
- Attack vector
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Technology
What to do nowOur advice
Referred to as 'MongoBleed' by some researchers, the report urged prompt remediation and did not confirm any specific victim organizations in the cited passages [1].
Timeline
- Security NEXT publishes report (date only; timestamp is a placeholder)[1]
Technical details
Verified Source Summary
MongoDB's zlib implementation contains vulnerability CVE-2025-14847, which may allow external actors to read uninitialized server heap memory [1].
Attackers with network access to a MongoDB Server can exploit the flaw without authentication, potentially exposing credentials, tokens, API keys, and database contents [1].
Referred to as 'MongoBleed' by some researchers, the report urged prompt remediation and did not confirm any specific victim organizations in the cited passages [1].
References
Media1
- [1]
“NoSQLデータベース「MongoDB」に情報漏洩の脆弱性が明らかとなった。重大な機密情報が外部より窃取されるおそれもあり、早急に対策を講じるよう呼びかけられている。”
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.