CVE-2026-13448: IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint ( /api/v1/build_public_tmp/{flow

highCVSS 8.1CVE-2026-13448

IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint ( /api/v1/build_public_tmp/{flow_id}/flow ). The vulnerability stems from an incomplete denylist in the validate_public_flow_no_code_execution() function that fails to block several code-execution agent components including OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.1
Published: 2026-07-17
Last updated: 2026-07-23
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-13448

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-134480.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-13448	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] IBM Langflow Desktop: Multiple vulnerabilitiescert-bund

Recent advisories for IBM Langflow OSS

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] IBM Langflow Desktop OSS: Vulnerability allows information disclosurecert-bund · 2026-07-31
criticalCVE-2026-12946: IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code o…nvd · 2026-07-30
highCVE-2026-13444: IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to access another user's private v…nvd · 2026-07-30
criticalCVE-2026-13435: IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in t…nvd · 2026-07-30
highCVE-2026-12942: IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on…nvd · 2026-07-30
mediumCVE-2026-10700: IBM Langflow OSS 1.0.0 through 1.8.4 contains multiple broken access control vulnerabilities i…nvd · 2026-07-30