CVE-2026-116575
CVE-2026-116575 · Mem0: Cross-tenant conversation leak via unescaped delimiter collision in session-scope key (_build_session_scope)
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Mem0 provides persistent memory infrastructure for AI agents and applications. Prior to Python SDK 2.0.18 and TypeScript SDK 3.1.6, _build_session_scope() in mem0/memory/main.py and Memory.buildSessionScope() in the TypeScript SDK join caller-controlled user_id, agent_id, and run_id values using unescaped & and = delimiters. A caller can embed another scope component in a controlled identifier so that distinct tenant tuples produce the same session_scope key. Memory.add(), AsyncMemory.add(), and the REST POST /memories flow use that key to read and save recent raw messages, allowing cross-tenant conversation disclosure and eviction or interleaving of another tenant's history. This issue is fixed in Python SDK 2.0.18 and TypeScript SDK 3.1.6.
CVSS 6.3 · Medium · EPSS 0.1% · Fix available
- Published
- Updated
Affected products and versions
mem0
- Versions
- < 2.0.18: Affected
No fix published
mem0ai PyPI
- Versions
- 0.0.1
- 0.0.10
- 0.0.11
- 0.0.12
- 0.0.13
- 0.0.14
- 0.0.15
- 0.0.16
- 0.0.17
- 0.0.18
- 0.0.19
- 0.0.2
- 0.0.20
- 0.0.20rc1
- 0.0.21
- 0.0.3
- 0.0.4
- 0.0.5
- 0.0.6
- 0.0.7
- 0.0.8
- 0.0.9
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.100
- 0.1.101
- 0.1.102
- 0.1.103
- 0.1.104
- 0.1.106
- 0.1.107
- 0.1.107rc1
- 0.1.107rc2
- 0.1.108
- 0.1.109
- 0.1.11
- 0.1.110
- 0.1.111
- 0.1.112
- 0.1.113
- 0.1.114
- 0.1.115
- 0.1.116
- 0.1.117
- 0.1.118
- 0.1.12
- 0.1.13
- 0.1.14
- 0.1.15
- 0.1.16
- 0.1.17
- 0.1.18
- 0.1.19
- 0.1.2
- 0.1.20
- 0.1.20a0
- 0.1.21
- 0.1.22
- 0.1.23
- 0.1.24
- 0.1.25
- 0.1.26
- 0.1.27
- 0.1.28
- 0.1.29
- 0.1.3
- 0.1.30
- 0.1.31
- 0.1.32
- 0.1.33
- 0.1.34
- 0.1.35
- 0.1.36
- 0.1.37
- 0.1.38
- 0.1.39
- 0.1.4
- 0.1.40
- 0.1.41
- 0.1.42
- 0.1.43
- 0.1.44
- 0.1.45
- 0.1.45rc1
- 0.1.46
- 0.1.47
- 0.1.48
- 0.1.49
- 0.1.5
- 0.1.50
- 0.1.52
- 0.1.53
- 0.1.54
- 0.1.55
- 0.1.56
- 0.1.57
- 0.1.58
- 0.1.59
- 0.1.6
- 0.1.60
- 0.1.61
- 0.1.62
- 0.1.63
- 0.1.65
- 0.1.66
- 0.1.67
- 0.1.69
- 0.1.7
- 0.1.70
- 0.1.71
- 0.1.72
- 0.1.73
- 0.1.74
- 0.1.75
- 0.1.76
- 0.1.77
- 0.1.78
- 0.1.78a0
- 0.1.78a1
- 0.1.78a2
- 0.1.79
- 0.1.8
- 0.1.80
- 0.1.81
- 0.1.81a0
- 0.1.81a1
- 0.1.81a2
- 0.1.82
- 0.1.83
- 0.1.84
- 0.1.84a1
- 0.1.85
- 0.1.86
- 0.1.87
- 0.1.88
- 0.1.89
- 0.1.9
- 0.1.90
- 0.1.91
- 0.1.92
- 0.1.93
- 0.1.94
- 0.1.95
- 0.1.96
- 0.1.96rc1
- 0.1.97
- 0.1.98
- 0.1.99
- 0.1.99a0
- 0.1.99a1
- 0.1.99a2
- 0.1.99a3
- 1.0.0
- 1.0.0b0
- 1.0.1
- 1.0.10
- 1.0.11
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.0.9
- 2.0.0
- 2.0.0b0
- 2.0.0b1
- 2.0.0b2
- 2.0.1
- 2.0.10
- 2.0.11
- 2.0.12
- 2.0.13
- 2.0.14
- 2.0.15
- 2.0.16
- 2.0.17
- 2.0.2
- 2.0.3
- 2.0.4
- 2.0.5
- 2.0.6
- 2.0.7
- 2.0.8
- Affected ranges
- ECOSYSTEM: < 2.0.18
Update to 2.0.18
mem0ai npm
- Affected ranges
- SEMVER: < 3.1.6
Update to 3.1.6
Original sources
- https://github.com/mem0ai/mem0/security/advisories/GHSA-5324-3w58-qpp2
- https://github.com/mem0ai/mem0/pull/6892
- https://github.com/mem0ai/mem0/commit/71f2ebefa3494da21550fb525216818776cde67f
- https://github.com/mem0ai/mem0/releases/tag/ts-v3.1.6
- https://github.com/mem0ai/mem0/releases/tag/v2.0.18
- https://nvd.nist.gov/vuln/detail/CVE-2026-116575