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CVE-2026-55443

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.3.9, several LangChain components that resolve filesystem paths or expand search patterns do not consistently confine the resolved path to the intended root directory. Affected behaviors include: a file-search agent middleware that validates a starting directory but not the search pattern or the resolved target of matched files, so glob patterns and symlinks can reach files outside the configured root; prompt-
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fb4335fe288d653b4a3c721230c866bb03a491ec1531121dfb0e05d624e00f38
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"langchain-anthropic","vendor":"langchain-ai","versions":[{"status":"affected","version":"< 1.4.6"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/affected/1

{"product":"langchain","vendor":"langchain-ai","versions":[{"status":"affected","version":"< 1.3.9"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/affected/0
cwe · 2 assertions

{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

2 source assertions
{"product":"langchain-anthropic","vendor":"langchain-ai","versions":[{"status":"affected","version":"< 1.4.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/affected/1
{"product":"langchain","vendor":"langchain-ai","versions":[{"status":"affected","version":"< 1.3.9"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/langchain-ai/langchain/commit/dcaf7795a3e6590af55c3ff7bda6add6355e9ea6","tags":["x_refsource_MISC"],"url":"https://github.com/langchain-ai/langchain/commit/dcaf7795a3e6590af55c3ff7bda6add6355e9ea6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/references/1
{"name":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-gr75-jv2w-4656","tags":["x_refsource_CONFIRM"],"url":"https://github.com/langchain-ai/langchain/security/advisories/GHSA-gr75-jv2w-4656"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7bb823bcb8efa1855cdd11775c594f957ee0b9c65e24a328390c29ce65d6d9da · sha256:20762f7dc405bd39… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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