CVSS 3.1
6.2 mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-33320
Medium (6.2) in tomwright dasel. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/tomwright/dasel/v3 3.3.2.
Dasel is a command-line tool and library for querying, modifying, and transforming data structures. Starting in version 3.0.0 and prior to version 3.3.1, Dasel's YAML reader allows an attacker who can supply YAML for processing to trigger extreme CPU and memory consumption. The issue is in the library's own `UnmarshalYAML` implementation, which manually resolves alias nodes by recursively following `yaml.Node.Alias` pointers without any expansion budget, bypassing go-yaml v4's built-in alias expansion limit. Version 3.3.2 contains a patch for the issue.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-31)
- CWE
- CWE-674
- Published
- Modified
- Record from
- the NVD, synced
Affected
- tomwright:dasel
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4fcp-jxh7-23x8 | Go | github.com/tomwright/dasel/v3 | >=3.0.0 <3.3.2 | 3.3.2 |
| GO-2026-4768 | Go | github.com/tomwright/dasel | all versions | no fix published |
| GO-2026-4768 | Go | github.com/tomwright/dasel/v2 | all versions | no fix published |
| GO-2026-4768 | Go | github.com/tomwright/dasel/v3 | >=3.0.0 <3.3.2 | 3.3.2 |