{"cve":"CVE-2026-33320","nvd":{"published":"2026-03-24T01:17:02.203","modified":"2026-06-17T10:37:19.127","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2},"cwes":["CWE-674"],"references":["https://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8"],"products":["tomwright:dasel"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33320","score":0.00219,"percentile":0.12427,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4fcp-jxh7-23x8","url":"https://osv.dev/vulnerability/GHSA-4fcp-jxh7-23x8","summary":"Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service","modified":"2026-09-10T03:50:37.139452298Z","packages":[{"ecosystem":"Go","name":"github.com/tomwright/dasel/v3","purl":"pkg:golang/github.com/tomwright/dasel/v3","ranges":[">=3.0.0 <3.3.2"],"fixed":["3.3.2"]}]},{"id":"GO-2026-4768","url":"https://osv.dev/vulnerability/GO-2026-4768","summary":"Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service in github.com/tomwright/dasel","modified":"2026-03-23T18:45:18.116859Z","packages":[{"ecosystem":"Go","name":"github.com/tomwright/dasel","purl":"pkg:golang/github.com/tomwright/dasel","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/tomwright/dasel/v2","purl":"pkg:golang/github.com/tomwright/dasel/v2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/tomwright/dasel/v3","purl":"pkg:golang/github.com/tomwright/dasel/v3","ranges":[">=3.0.0 <3.3.2"],"fixed":["3.3.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}