# CVE-2021-32635: Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint

Source: https://junglewise.ai/threats/cve-2021-32635-action-commands-run-shell-exec-against-library-uris-ignore  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-06-01  
License: CC BY 4.0 with a link back

CVE-2021-32635 · Severity: low · CVSS 3.1 · Published 2021-06-01

Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint

Technologies: [github.com/sylabs/singularity (Go)](https://junglewise.ai/threats/technologies/github-com-sylabs-singularity). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2021-32635 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-32635 being exploited in the wild.

**How severe is CVE-2021-32635?** Low severity, with a CVSS score of 3.1, published 1 June 2021.

**Which products and versions are affected?** github.com/sylabs/singularity (Go) SEMVER:introduced=3.7.2,fixed=3.7.4.

**Is there a fix for CVE-2021-32635?** Yes. github.com/sylabs/singularity (Go): upgrade to 3.7.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-32635?** Check whether you run github.com/sylabs/singularity (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/sylabs/singularity (Go): upgrade to 3.7.4 or later

  ```sh
  go get github.com/sylabs/singularity@v3.7.4
  ```


## Affected products

- github.com/sylabs/singularity (Go) SEMVER:introduced=3.7.2,fixed=3.7.4

## Identifiers

- CVE-2021-32635
- GHSA-5mv9-q7fq-9394

## Related threats

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- [GO-2025-4177 - Singularity ineffectively applies of selinux / apparmor LSM process labels in github.com/sylabs/singularity](https://junglewise.ai/threats/cve-2025-64750-singluarity-ineffectively-applies-selinux-apparmor-lsm-process)
- [Singularity insecure permissions](https://junglewise.ai/threats/cve-2019-19724-singularity-insecure-permissions)
- [Sylabs Singularity Improper Input Validation](https://junglewise.ai/threats/cve-2018-19295-sylabs-singularity-improper-input-validation)
- [Insecure permissions on user namespace / fakeroot temporary rootfs in Singularity](https://junglewise.ai/threats/cve-2020-25039-insecure-permissions-on-user-namespace-fakeroot-temporary-rootfs)