Critical severity10.0OSV Advisory· Published Jan 8, 2026· Updated Jun 17, 2026
CVE-2026-21858
CVE-2026-21858
Description
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | >= 1.65.0, < 1.121.0 | 1.121.0 |
Affected products
2Patches
Vulnerability mechanics
References
4- www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858nvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-v4pr-fm98-w9pgghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pgnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-21858ghsaADVISORY
News mentions
8- The Agentic AI threat cluster: Seven incidents, three actors, and what they mean for your exposureTenable Blog · Aug 15, 2026
- Chinese hacker used DeepSeek to launch autonomous cyberattacks on vulnerable serversHelp Net Security · Aug 3, 2026
- Hacker uses DeepSeek AI to autonomously attack vulnerable serversBleepingComputer · Jul 31, 2026
- Chinese Hacker Uses DeepSeek AI to Orchestrate Vulnerability ExploitsInfosecurity Magazine · Jul 31, 2026
- Chinese Hacker Commands DeepSeek via Telegram to Launch Autonomous AttacksThe Hacker News · Jul 31, 2026
- ThreatsDay: AI-Powered Hacking, 370 Chrome Flaws, SonicWall Attacks, DNS Hijacking + 22 More StoriesThe Hacker News · Jul 30, 2026
- Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous CyberattacksUnit 42 · Jul 30, 2026
- Risky Business #820 -- Asian fraud kingpin will face Chinese justice (pew pew!)Risky Business · Jan 14, 2026