Medium severity · published Jun 30, 2026
CVE-2026-10546
DNS Rebinding TOCTOU Bypass of SSRF Protection in Langflow OSS URL Component
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
IBM Langflow OSS 1.0.0 through 1.9.3 contains a Server-Side Request Forgery (SSRF) vulnerability in the URL component ( src/lfx/src/lfx/components/data_source/url.py ) due to a Time-of-Check/Time-of-Use (TOCTOU) race condition that can be exploited via DNS rebinding.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% 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 1.9.3 · source: vendor
LA
Langflow · Langflow
1.0.0 through 1.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10546
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-10546
Vendor Advisory
https://www.ibm.com/support/pages/node/7277560
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