CVE-2021-41641 Link Following in Deno

What is CVE-2021-41641?

CVE-2021-41641 is a high-severity path traversal vulnerability in n/a, published on 12 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Deno <=1.14.0 file sandbox does not handle symbolic links correctly. When running Deno with specific write access, the Deno.symlink method can be used to gain access to any directory.

Weakness: CWE-59

Which versions are affected by CVE-2021-41641?

2 open source packages ship an affected version, including deno. It affects 1 product.

Products include Deno Deno.

How do I fix CVE-2021-41641?

Upgrade deno to 1.16.0 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-41641 being exploited?

There is no known exploitation of CVE-2021-41641 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2023-28445 Deno improperly handles resizable ArrayBuffer Critical 10.0
• CVE-2022-24783 Sandbox bypass leading to arbitrary code execution in Deno Critical 10.0
• CVE-2021-32619 Static imports inside dynamically imported modules do not adhere to permission checks Critical 9.8
• CVE-2026-22863 Deno node:crypto doesn't finalize cipher Critical 9.2
• CVE-2024-27936 Deno interactive permission prompt spoofing via improper ANSI stripping High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-67hm-27mx-9cg7, JLSEC-2026-99.