CVE-2026-33320

Name	CVE-2026-33320
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dasel (PTS)	forky, sid, trixie	2.8.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dasel	source	(unstable)	(not affected)

Notes

- dasel <not-affected> (Vulnerable code not present)
https://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8
https://github.com/TomWright/dasel/pull/531
Fixed by: https://github.com/TomWright/dasel/commit/282943b3720684ae0ea89432f51755325a841c75 (v3.3.2)