CVE-2026-107366: IBM Langflow OSS lacks ownership verification on message endpoints enabling session hijacking
IBM Langflow OSS
IBM Langflow OSS versions 1.0.0 through 1.12.4 contain message endpoints lacking ownership verification. Authenticated users can bulk-delete messages, inject malicious prompts by overwriting content, or hijack conversation sessions.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 8.3
- EPSS
- <0.01 · top 77% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 20 Oct 2026
- last update
- 20 Oct 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-10-20CVE-2026-107366: IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification.NVD · nvd.nist.gov/vuln/detail/CVE-2026-107366
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerabilityPrompt injectionAgent hijack
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- dates
- happened 20 Oct 2026 · first reported 20 Oct 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-20 04:59Z · updated 2026-10-20 04:59Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# CVE-2026-107366: IBM Langflow OSS lacks ownership verification on message endpoints enabling session hijacking https://gcdradar.vercel.app/incidents/cve-2026-107366-ibm-langflow-oss-lacks-ownership-verificatio · AIR-2026-1427 · closed 2026-10-20 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-10-20 - AI role: Attack on AI - Products: IBM Langflow OSS - CVE ids: CVE-2026-107366 - CVSS: 8.3 ## Summary IBM Langflow OSS versions 1.0.0 through 1.12.4 contain message endpoints lacking ownership verification. Authenticated users can bulk-delete messages, inject malicious prompts by overwriting content, or hijack conversation sessions. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-10-20: CVE-2026-107366: IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. (https://nvd.nist.gov/vuln/detail/CVE-2026-107366) ## Sources - 2026-10-20 NVD: CVE-2026-107366: IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. https://nvd.nist.gov/vuln/detail/CVE-2026-107366 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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