# CVE-2026-33320: Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service

Source: https://junglewise.ai/threats/cve-2026-33320-dasel-has-unbounded-yaml-alias-expansion-in-dasel-leads-to-cpu  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-23  
License: CC BY 4.0 with a link back

CVE-2026-33320 · Severity: low · CVSS 3.1 · Published 2026-03-23

Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service in github.com/tomwright/dasel

Technologies: [github.com/tomwright/dasel (Go)](https://junglewise.ai/threats/technologies/github-com-tomwright-dasel), [github.com/tomwright/dasel/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-tomwright-dasel-v2), [github.com/tomwright/dasel/v3 (Go)](https://junglewise.ai/threats/technologies/github-com-tomwright-dasel-v3). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-33320 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33320 being exploited in the wild.

**How severe is CVE-2026-33320?** Low severity, with a CVSS score of 3.1, published 23 March 2026.

**Which products and versions are affected?** github.com/tomwright/dasel (Go) SEMVER:introduced=0; github.com/tomwright/dasel/v2 (Go) SEMVER:introduced=0; github.com/tomwright/dasel/v3 (Go) SEMVER:introduced=3.0.0,fixed=3.3.2.

**Is there a fix for CVE-2026-33320?** Yes. github.com/tomwright/dasel/v3 (Go): upgrade to 3.3.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-33320?** Check whether you run github.com/tomwright/dasel (Go), github.com/tomwright/dasel/v2 (Go) or github.com/tomwright/dasel/v3 (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/tomwright/dasel/v3 (Go): upgrade to 3.3.2 or later

  ```sh
  go get github.com/tomwright/dasel/v3@v3.3.2
  ```


## Affected products

- github.com/tomwright/dasel (Go) SEMVER:introduced=0
- github.com/tomwright/dasel/v2 (Go) SEMVER:introduced=0
- github.com/tomwright/dasel/v3 (Go) SEMVER:introduced=3.0.0,fixed=3.3.2

## Identifiers

- CVE-2026-33320
- GHSA-4fcp-jxh7-23x8
- GO-2026-4768

## Related threats

- [Dasel selector lexer panic on trailing whitespace](https://junglewise.ai/threats/cve-2026-62866-dasel-selector-lexer-panic-on-trailing-whitespace)
- [Dasel unbounded recursion in JSON and XML readers causes stack overflow DoS](https://junglewise.ai/threats/cve-2026-59168-dasel-unbounded-recursion-in-json-and-xml-readers-causes-stack)
- [TomWright Dasel infinite loop in selector lexer](https://junglewise.ai/threats/cve-2026-46378-tomwright-dasel-infinite-loop-in-selector-lexer)
- [TomWright Dasel index out of bounds panic in selector lexer](https://junglewise.ai/threats/cve-2026-46377-tomwright-dasel-index-out-of-bounds-panic-in-selector-lexer)