CVE-2026-27794

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Source
https://cve.org/CVERecord?id=CVE-2026-27794
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27794.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-27794
Aliases
Published
2026-02-25T16:53:47.176Z
Modified
2026-03-01T01:34:31.956908Z
Severity
  • 6.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
LangGraph: BaseCache Deserialization of Untrusted Data may lead to Remote Code Execution
Details

LangGraph Checkpoint defines the base interface for LangGraph checkpointers. Prior to version 4.0.0, a Remote Code Execution vulnerability exists in LangGraph's caching layer when applications enable cache backends that inherit from BaseCache and opt nodes into caching via CachePolicy. Prior to langgraph-checkpoint 4.0.0, BaseCache defaults to JsonPlusSerializer(pickle_fallback=True). When msgpack serialization fails, cached values can be deserialized via pickle.loads(...). Caching is not enabled by default. Applications are affected only when the application explicitly enables a cache backend (for example by passing cache=... to StateGraph.compile(...) or otherwise configuring a BaseCache implementation), one or more nodes opt into caching via CachePolicy, and the attacker can write to the cache backend (for example a network-accessible Redis instance with weak/no auth, shared cache infrastructure reachable by other tenants/services, or a writable SQLite cache file). An attacker must be able to write attacker-controlled bytes into the cache backend such that the LangGraph process later reads and deserializes them. This typically requires write access to a networked cache (for example a network-accessible Redis instance with weak/no auth or shared cache infrastructure reachable by other tenants/services) or write access to local cache storage (for example a writable SQLite cache file via permissive file permissions or a shared writable volume). Because exploitation requires write access to the cache storage layer, this is a post-compromise / post-access escalation vector. LangGraph Checkpoint 4.0.0 patches the issue.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27794.json"
}
References

Affected packages

Git / github.com/langchain-ai/langgraph

Affected ranges

Type
GIT
Repo
https://github.com/langchain-ai/langgraph
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f91d79d0c86932ded6e3b9f195d5a0bbd5aef99c

Affected versions

0.*
0.1.10
0.1.11
0.1.12
0.1.13
0.1.14
0.1.15
0.1.16
0.1.17
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.2.1
0.2.10
0.2.11
0.2.12
0.2.13
0.2.15
0.2.16
0.2.17
0.2.18
0.2.19
0.2.2
0.2.20
0.2.21
0.2.22
0.2.23
0.2.24
0.2.25
0.2.26
0.2.27
0.2.28
0.2.29
0.2.3
0.2.30
0.2.31
0.2.32
0.2.33
0.2.34
0.2.35
0.2.36
0.2.37
0.2.38
0.2.39
0.2.4
0.2.40
0.2.41
0.2.42
0.2.43
0.2.44
0.2.45
0.2.46
0.2.47
0.2.48
0.2.49
0.2.5
0.2.50
0.2.51
0.2.52
0.2.53
0.2.54
0.2.55
0.2.56
0.2.57
0.2.58
0.2.59
0.2.6
0.2.60
0.2.61
0.2.62
0.2.63
0.2.64
0.2.65
0.2.66
0.2.67
0.2.68
0.2.69
0.2.7
0.2.70
0.2.71
0.2.72
0.2.73
0.2.74
0.2.75
0.2.76
0.2.9
0.3.0
0.3.1
0.3.10
0.3.11
0.3.12
0.3.13
0.3.14
0.3.15
0.3.16
0.3.17
0.3.18
0.3.19
0.3.2
0.3.20
0.3.21
0.3.22
0.3.23
0.3.24
0.3.25
0.3.26
0.3.27
0.3.28
0.3.29
0.3.3
0.3.30
0.3.31
0.3.32
0.3.34
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.5.0
0.5.0rc0
0.5.0rc1
0.5.1
0.5.2
0.5.3
0.5.4
0.6.0
0.6.0a1
0.6.0a2
0.6.1
0.6.10
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
1.*
1.0.0
1.0.0rc1
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
checkpoint==1.*
checkpoint==1.0.0
checkpoint==1.0.1
checkpoint==1.0.10
checkpoint==1.0.11
checkpoint==1.0.12
checkpoint==1.0.13
checkpoint==1.0.14
checkpoint==1.0.2
checkpoint==1.0.3
checkpoint==1.0.4
checkpoint==1.0.7
checkpoint==1.0.8
checkpoint==1.0.9
checkpoint==2.*
checkpoint==2.0.0
checkpoint==2.0.1
checkpoint==2.0.10
checkpoint==2.0.12
checkpoint==2.0.13
checkpoint==2.0.14
checkpoint==2.0.15
checkpoint==2.0.16
checkpoint==2.0.17
checkpoint==2.0.18
checkpoint==2.0.19
checkpoint==2.0.2
checkpoint==2.0.20
checkpoint==2.0.21
checkpoint==2.0.22
checkpoint==2.0.23
checkpoint==2.0.24
checkpoint==2.0.25
checkpoint==2.0.26
checkpoint==2.0.3
checkpoint==2.0.4
checkpoint==2.0.5
checkpoint==2.0.6
checkpoint==2.0.7
checkpoint==2.0.8
checkpoint==2.0.9
checkpoint==2.1.0
checkpoint==2.1.1
checkpoint==2.1.2
checkpoint==3.*
checkpoint==3.0.0
checkpoint==3.0.1
checkpointduckdb==2.*
checkpointduckdb==2.0.0
checkpointduckdb==2.0.1
checkpointduckdb==2.0.2
checkpointpostgres==1.*
checkpointpostgres==1.0.0
checkpointpostgres==1.0.1
checkpointpostgres==1.0.10
checkpointpostgres==1.0.11
checkpointpostgres==1.0.2
checkpointpostgres==1.0.3
checkpointpostgres==1.0.4
checkpointpostgres==1.0.5
checkpointpostgres==1.0.6
checkpointpostgres==1.0.7
checkpointpostgres==1.0.8
checkpointpostgres==1.0.9
checkpointpostgres==2.*
checkpointpostgres==2.0.0
checkpointpostgres==2.0.1
checkpointpostgres==2.0.10
checkpointpostgres==2.0.11
checkpointpostgres==2.0.12
checkpointpostgres==2.0.13
checkpointpostgres==2.0.14
checkpointpostgres==2.0.15
checkpointpostgres==2.0.16
checkpointpostgres==2.0.17
checkpointpostgres==2.0.18
checkpointpostgres==2.0.19
checkpointpostgres==2.0.2
checkpointpostgres==2.0.20
checkpointpostgres==2.0.21
checkpointpostgres==2.0.22
checkpointpostgres==2.0.23
checkpointpostgres==2.0.24
checkpointpostgres==2.0.25
checkpointpostgres==2.0.3
checkpointpostgres==2.0.4
checkpointpostgres==2.0.5
checkpointpostgres==2.0.6
checkpointpostgres==2.0.7
checkpointpostgres==2.0.8
checkpointpostgres==2.0.9
checkpointpostgres==3.*
checkpointpostgres==3.0.0
checkpointpostgres==3.0.1
checkpointpostgres==3.0.2
checkpointsqlite==1.*
checkpointsqlite==1.0.0
checkpointsqlite==1.0.1
checkpointsqlite==1.0.2
checkpointsqlite==1.0.3
checkpointsqlite==1.0.4
checkpointsqlite==2.*
checkpointsqlite==2.0.0
checkpointsqlite==2.0.1
checkpointsqlite==2.0.10
checkpointsqlite==2.0.11
checkpointsqlite==2.0.2
checkpointsqlite==2.0.3
checkpointsqlite==2.0.4
checkpointsqlite==2.0.5
checkpointsqlite==2.0.6
checkpointsqlite==2.0.7
checkpointsqlite==2.0.8
checkpointsqlite==2.0.9
checkpointsqlite==3.*
checkpointsqlite==3.0.0
checkpointsqlite==3.0.1
cli==0.*
cli==0.1.40
cli==0.1.41
cli==0.1.42
cli==0.1.44
cli==0.1.45
cli==0.1.45a0
cli==0.1.45a1
cli==0.1.46
cli==0.1.47
cli==0.1.48
cli==0.1.49
cli==0.1.50
cli==0.1.51
cli==0.1.52
cli==0.1.53
cli==0.1.54
cli==0.1.55
cli==0.1.55rc1
cli==0.1.56
cli==0.1.57
cli==0.1.58
cli==0.1.59
cli==0.1.60
cli==0.1.61
cli==0.1.62
cli==0.1.63
cli==0.1.64
cli==0.1.65
cli==0.1.66
cli==0.1.67
cli==0.1.68
cli==0.1.69
cli==0.1.70
cli==0.1.71
cli==0.1.72
cli==0.1.73
cli==0.1.74
cli==0.1.75
cli==0.1.76
cli==0.1.77
cli==0.1.78
cli==0.1.79
cli==0.1.80
cli==0.1.81
cli==0.1.82
cli==0.1.83
cli==0.1.84
cli==0.1.89
cli==0.2.1
cli==0.2.10
cli==0.2.11
cli==0.2.12
cli==0.2.2
cli==0.2.3
cli==0.2.4
cli==0.2.5
cli==0.2.6
cli==0.2.7
cli==0.2.8
cli==0.2.9
cli==0.3.1
cli==0.3.2
cli==0.3.3
cli==0.3.4
cli==0.3.5
cli==0.3.6
cli==0.3.7
cli==0.3.8
cli==0.4.0
cli==0.4.1
cli==0.4.10
cli==0.4.11
cli==0.4.2
cli==0.4.3
cli==0.4.4
cli==0.4.6
cli==0.4.8
cli==0.4.9
langgraph-cli==0.*
langgraph-cli==0.1.39
prebuilt==0.*
prebuilt==0.1.0
prebuilt==0.1.1
prebuilt==0.1.2
prebuilt==0.1.3
prebuilt==0.1.4
prebuilt==0.1.5
prebuilt==0.1.6
prebuilt==0.1.7
prebuilt==0.1.8
prebuilt==0.2.0
prebuilt==0.2.1
prebuilt==0.2.2
prebuilt==0.5.0
prebuilt==0.5.0rc0
prebuilt==0.5.1
prebuilt==0.5.2
prebuilt==0.6.0
prebuilt==0.6.0a1
prebuilt==0.6.1
prebuilt==0.6.2
prebuilt==0.6.3
prebuilt==0.6.4
prebuilt==0.7.0rc1
prebuilt==1.*
prebuilt==1.0.0
prebuilt==1.0.1
prebuilt==1.0.2
prebuilt==1.0.3
prebuilt==1.0.4
prebuilt==1.0.5
sdk==0.*
sdk==0.1.23
sdk==0.1.24
sdk==0.1.25
sdk==0.1.26
sdk==0.1.27
sdk==0.1.28
sdk==0.1.29
sdk==0.1.30
sdk==0.1.31
sdk==0.1.32
sdk==0.1.33
sdk==0.1.34
sdk==0.1.35
sdk==0.1.36
sdk==0.1.37
sdk==0.1.38
sdk==0.1.39
sdk==0.1.40
sdk==0.1.42
sdk==0.1.43
sdk==0.1.44
sdk==0.1.45
sdk==0.1.46
sdk==0.1.47
sdk==0.1.48
sdk==0.1.50
sdk==0.1.51
sdk==0.1.53
sdk==0.1.55
sdk==0.1.56
sdk==0.1.57
sdk==0.1.58
sdk==0.1.59
sdk==0.1.60
sdk==0.1.61
sdk==0.1.62
sdk==0.1.63
sdk==0.1.64
sdk==0.1.65
sdk==0.1.66
sdk==0.1.69
sdk==0.1.70
sdk==0.1.71
sdk==0.1.72
sdk==0.1.73
sdk==0.1.74
sdk==0.2.0
sdk==0.2.0a1
sdk==0.2.1
sdk==0.2.10
sdk==0.2.12
sdk==0.2.14
sdk==0.2.15
sdk==0.2.2
sdk==0.2.3
sdk==0.2.4
sdk==0.2.5
sdk==0.2.6
sdk==0.2.7
sdk==0.2.8
sdk==0.2.9
sdk==0.3.0
sdk==0.3.1
sdk==0.3.2
v0.*
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27794.json"