{"id":"CVE-2026-53655","summary":"node-tar applies PAX size override to intermediary GNU long-name/long-link headers, causing tar parser interpretation differential (file smuggling)","details":"node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's size= record (and other PAX overrides) to the next header entry of any type, including intermediary metadata headers such as a GNU long-name (L) or long-link (K) entry. Per POSIX pax, a PAX extended header (x) describes the next file entry, not the intermediary extension headers that may sit between the x header and the file it annotates. Because node-tar lets the PAX size override the byte length of an intervening L/K/x header, an attacker can desynchronize node-tar's stream cursor relative to every other mainstream tar implementation (GNU tar, libarchive/bsdtar, Python tarfile, and the now-fixed tar-rs / astral-tokio-tar). The result is a tar parser interpretation differential (CWE-436): a single crafted archive yields a different set of members under node-tar than under the reference tar tools. An attacker can use this to hide a member from one parser while it is visible to another, which defeats security tooling whose scanner and extractor disagree on archive contents (e.g. a malware/secret scanner that lists entries with one library while a downstream step extracts with another) This vulnerability is fixed in 7.5.16.","aliases":["GHSA-vmf3-w455-68vh"],"modified":"2026-07-15T01:49:00.312224404Z","published":"2026-06-22T14:55:50.133Z","related":["CGA-jg37-pm8g-67gr"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-436"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53655.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53655.json"},{"type":"ADVISORY","url":"https://github.com/isaacs/node-tar/security/advisories/GHSA-vmf3-w455-68vh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53655"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/isaacs/node-tar","events":[{"introduced":"0"},{"fixed":"cf213384ac558b539c07c830ed7cca5ffc9e8550"}],"database_specific":{"cpe":"cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"0"},{"fixed":"7.5.16"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v7.5.15","v7.5.14","v7.5.13","v7.5.12","v7.5.11","v7.5.10","v7.5.9","v7.5.8","v7.5.7","v7.5.6","v7.5.5","v7.5.4","v7.5.3","v7.5.2","v7.5.1","v7.5.0","v7.4.4","v7.4.3","v7.4.2","v7.4.1","v7.4.0","v7.3.0","v7.2.0","v7.1.0","v7.0.1","v7.0.0","v6.2.1","v6.2.0","v6.1.15","v6.1.14","v6.1.13","v6.1.12","v6.1.11","v6.1.10","v6.1.9","v6.1.8","v6.1.7","v6.1.6","v6.1.5","v6.1.4","v6.1.3","v6.1.2","v6.1.1","v4.4.13","v5.0.5","v6.1.0","v6.0.5","v6.0.4","v6.0.3","v6.0.2","v6.0.1","v6.0.0","v5.0.2","v5.0.4","v5.0.3","v5.0.1","v4.4.12","v4.4.11","v4.4.10","v4.4.9","v2.2.1","v4.4.8","v4.4.7","v4.4.6","v4.4.5","v4.4.4","v4.4.3","v4.4.2","v4.4.1","v4.4.0","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.0","v4.1.2","v4.1.1","v4.1.0","v4.0.2","v4.0.1","v3.2.0","v4.0.0","v3.1.15","v3.1.14","v3.1.13","v3.1.12","v3.1.11","v3.1.10","v3.1.9","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.1","v3.0.0","v2.1.1","v2.1.0","v2.0.1","v2.0.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.1.20","v0.1.19","v0.1.18","v0.1.17","v0.1.16","v0.1.15","v0.1.14","0.1.13","0.1.12","0.1.11","0.1.10","0.1.9","0.1.8","0.1.7","0.1.6","0.1.5","0.1.3","0.1.2","0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53655.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}