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CVE-2026-33320

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 exp
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d64e07a35d2dbfd00db689ae43fa3ec5f6e742cf3cc737570217806fcb9ebca0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"dasel","vendor":"TomWright","versions":[{"status":"affected","version":">= 3.0.0, < 3.3.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:398e072591563c398b20774aeb2edea727c8d1a5ff63474c847f7fd6f6fafcaf · sha256:4f46abe5daeb7412… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:398e072591563c398b20774aeb2edea727c8d1a5ff63474c847f7fd6f6fafcaf · sha256:4f46abe5daeb7412… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:398e072591563c398b20774aeb2edea727c8d1a5ff63474c847f7fd6f6fafcaf · sha256:4f46abe5daeb7412… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:398e072591563c398b20774aeb2edea727c8d1a5ff63474c847f7fd6f6fafcaf · sha256:4f46abe5daeb7412… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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