What is CVE-2026-81268?

CVE-2026-81268 is a high-severity vulnerability in IBM Langflow Oss, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2026-09-10.

How severe is CVE-2026-81268?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in IBM Langflow Oss

CVE-2026-81268

IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote authenticated attacker to execute flows and obtain sensitive information due to insufficient session expiration of API keys after user deactivation.

Published 2026-09-10 · last modified 2026-09-16.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (37.3th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

www.ibm.com/support/pages/node/7286662 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-81268?: CVE-2026-81268 is a high-severity vulnerability in IBM Langflow Oss, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2026-09-10.
How severe is CVE-2026-81268?: High severity. CVSS v3 base score is 8.1 out of 10.