Critical severity · published Jun 30, 2026
CVE-2026-10560
Unauthenticated Access to Private Flow Build Events and Cancellation in Langflow OSS
9.1
CVSS
0.5%
EPSS
No
On KEV
Description
IBM Langflow OSS 1.0.0 through 1.9.6 contains a missing authentication vulnerability in /api/v1/build_public_tmp/ endpoints that allows an unauthenticated attacker to read build event data or cancel jobs using a valid job identifier, resulting in information disclosure and denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LO
Langflow OSS · IBM
1.0.0 through 1.9.6 · source: vendor
LA
Langflow · Langflow
1.0.0 through 1.9.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10560
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-10560
Vendor Advisory
https://www.ibm.com/support/pages/node/7277996
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