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CVE-2026-55450

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixe
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cb687196097dc0aa8dfd3b40fc0c5c9160ca8d029aea0254dc3553e8698a152b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"langflow","vendor":"langflow-ai","versions":[{"status":"affected","version":"< 1.9.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/problemTypes/2/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/langflow-ai/langflow/pull/12831","tags":["x_refsource_MISC"],"url":"https://github.com/langflow-ai/langflow/pull/12831"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /containers/adp/0/references/0
{"name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735","tags":["x_refsource_CONFIRM"],"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:88a29327eb9ecbbfe439b3f8ec2e35151b16997af627d96632ce989d7d5ffe5b · sha256:56191f6f7ef92cca… · /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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