What is CVE-2026-7871?

CVE-2026-7871 is a critical-severity vulnerability in IBM Langflow Oss, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-06-30.

How severe is CVE-2026-7871?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in IBM Langflow Oss

CVE-2026-7871

IBM Langflow OSS 1.0.0 through 1.10.0 allows users with Redis access to execute arbitrary code with full application privileges, compromising all secrets, data, and system integrity.

Vulnerability class: Insecure Deserialization

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

IBM Langflow Oss — versions 1.0.0
Langflow

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

www.ibm.com/support/pages/node/7278443 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-7871?: CVE-2026-7871 is a critical-severity vulnerability in IBM Langflow Oss, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-06-30.
How severe is CVE-2026-7871?: Critical severity. CVSS v3 base score is 9.8 out of 10.