IBM Langflow up to 1.10.1 PythonREPL Sandbox input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$5k-$25k1.72-

Summaryinfo

A vulnerability labeled as critical has been found in IBM Langflow up to 1.10.1. Impacted is an unknown function of the component PythonREPL Sandbox. Such manipulation leads to input validation. This vulnerability is traded as CVE-2026-13435. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in IBM Langflow up to 1.10.1. It has been rated as critical. Affected by this issue is an unknown part of the component PythonREPL Sandbox. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.

The advisory is shared for download at ibm.com. This vulnerability is handled as CVE-2026-13435 since 06/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/30/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/26/2026 CVE reserved
07/30/2026 +34 days Advisory disclosed
07/30/2026 +0 days VulDB entry created
07/30/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: ibm.com

Advisory: ibm.com
Status: Confirmed

CVE: CVE-2026-13435 (🔒)
GCVE (CVE): GCVE-0-2026-13435
GCVE (VulDB): GCVE-100-384884

Entryinfo

Created: 07/30/2026 19:32
Changes: 07/30/2026 19:32 (53)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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