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01 Record

CVE-2026-18904

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

HighPUBLISHEDCNA: ibm
CNA base score8.2 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

02 Description

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.44% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 38.3% of scored records. A rank, not a probability.
NVD base score
8.2 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-08-31.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-28 20:52Z2 MO AGO
Last updated
2026-08-31 18:44Z1 MO AGO
Reserved
2026-08-04
Assigning CNA
ibm
Record state
PUBLISHED
Severity
High (CVSS 8.2)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Weaknesses
  • CWE-639Authorization Bypass Through User-Controlled KeyBase
Data version
5.2
Document digest
7d13dcd3817933780f4041b79f67f362e2e7800aa6313584ac7a28683cd0158e

05 Affected products

VendorProductVersionsPlatforms
IBMLangflow OSS1.0.0 to 1.11.1—

06 References

07 Remediation

IBM strongly recommends addressing the vulnerability now by upgrading Langflow OSS to version 1.11.2 https://pypi.org/project/langflow/