{"id":"GHSA-jqpw-qww5-cj4c","summary":"n8n: Denial of Service via ZIP decompression in webhook workflow","details":"## Impact\nThe Compression node's Decompress operation expanded attacker-controlled archives into memory without enforcing limits on decompressed output size. An unauthenticated attacker could send a small compressed archive to a public webhook workflow using this node, causing the n8n process to terminate due to memory exhaustion and disrupting all workflows in the same instance. \n\n## Patches\nThe issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability. The fix introduces configurable limits on decompressed output size (`N8N_COMPRESSION_NODE_MAX_DECOMPRESSED_SIZE_BYTES`) and ZIP entry count (`N8N_COMPRESSION_NODE_MAX_ZIP_ENTRIES`).\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Disable the Compression node by adding `n8n-nodes-base.compression` to the `NODES_EXCLUDE` environment variable.\n- Restrict public webhook workflows that accept archive file uploads to authenticated endpoints only.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","aliases":["CVE-2026-54314"],"modified":"2026-07-20T13:45:32.186204762Z","published":"2026-06-16T23:01:51Z","database_specific":{"cwe_ids":["CWE-409"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-06-16T23:01:51Z","nvd_published_at":"2026-06-23T16:17:02Z"},"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-jqpw-qww5-cj4c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54314"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"}],"affected":[{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.24.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jqpw-qww5-cj4c/GHSA-jqpw-qww5-cj4c.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}