PatchTheCVECVE-2016-10621: fibjs is a runtime for javascript applictions built on google v8 JS
CVE-2016-10621 is a high-severity flaw (CVSS 8.1) affecting fibjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
fibjs is a runtime for javascript applictions built on google v8 JS. fibjs downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the requested binary with an attacker controlled binary if the attacker is on the network or positioned in between the user and the remote server.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2016-10621?
fibjs: upgrade to newer than 0.1.8. Exact commands for each OS are on this page.
Is CVE-2016-10621 being exploited?
CVE-2016-10621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2016-10621 affect?
CVE-2016-10621 affects fibjs. Severity is high (CVSS 8.1). fibjs is a runtime for javascript applictions built on google v8 JS. fibjs downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the request
How urgent is CVE-2016-10621?
Priority 53/100. High severity; Remotely exploitable, no login, no user action