{"id":"EUVD-2026-38255","enisaUuid":"4c69f4eb-bf24-368f-8baa-3625bdd63496","description":"node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header\u0027s size\u003d 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\u0027s 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.","datePublished":"Jun 22, 2026, 2:55:50 PM","dateUpdated":"Jun 23, 2026, 4:09:06 PM","baseScore":6.9,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/isaacs/node-tar/security/advisories/GHSA-vmf3-w455-68vh\n","aliases":"CVE-2026-53655\nGHSA-vmf3-w455-68vh\n","assigner":"GitHub_M","epss":0.16,"enisaIdProduct":[{"id":"a37e96e5-28d8-342b-8137-60ab7e643abf","product":{"name":"node-tar","vendor":{"name":"isaacs"}},"product_version":"\u003c 7.5.16"}],"enisaIdVendor":[{"id":"54b167a8-3f6a-3c83-80dd-7ffaf0e334d0","vendor":{"name":"isaacs"}}],"enisaIdVulnerability":[{"id":"5e185ea4-abc6-35c8-b431-3aa82448d5ff","vulnerability":{"id":"CVE-2026-53655","description":"node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header\u0027s size\u003d 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\u0027s 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.","datePublished":"Jun 22, 2026, 2:55:50 PM","dateUpdated":"Jun 23, 2026, 4:09:06 PM","status":"PUBLISHED","baseScore":6.9,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/isaacs/node-tar/security/advisories/GHSA-vmf3-w455-68vh\n","enisa_id":"EUVD-2026-38255\n","assigner":"GitHub_M","epss":0.16,"dataProcessed":"Nov 7, 2026, 7:20:34 AM","vulnerabilityProduct":[{"id":"91f745dd-b59b-3d0d-9023-2bd33073ccce","product":{"name":"node-tar","vendor":{"name":"isaacs"}},"product_version":"\u003c 7.5.16"}],"vulnerabilityVendor":[{"id":"ee67c016-2163-30f5-853b-1f42714bdea6","vendor":{"name":"isaacs"}}]}},{"id":"99e988f3-9385-3a9a-92a9-af0a991c73c2","vulnerability":{"id":"GHSA-vmf3-w455-68vh","description":"node-tar applies PAX size override to intermediary GNU long-name/long-link headers, causing tar parser interpretation differential (file smuggling)","datePublished":"Jun 15, 2026, 5:19:42 PM","dateUpdated":"Jun 15, 2026, 5:19:42 PM","baseScore":0.0,"references":"https://github.com/isaacs/node-tar/security/advisories/GHSA-vmf3-w455-68vh\nhttps://github.com/isaacs/node-tar\n","enisa_id":"EUVD-2026-38255\n","aliases":"CVE-2026-53655\nGHSA-vmf3-w455-68vh\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:01:46 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[{"id":"8f1fe731-8a10-3f7a-880c-2d87e731b6ac","advisory":{"id":"msrc_CVE-2026-53655","description":"node-tar applies PAX size override to intermediary GNU long-name/long-link headers, causing tar parser interpretation differential (file smuggling)","datePublished":"Jun 28, 2026, 1:04:35 AM","dateUpdated":"Aug 12, 2026, 11:50:44 PM","baseScore":0.0,"references":"https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53655.json\n","aliases":"CVE-2026-53655\n","source":{"id":20,"name":"csaf_microsoft"},"advisoryProduct":[{"id":"81179c16-779a-39dc-9552-7621b7068155","product":{"name":"Azure Linux","vendor":{"name":"Microsoft"}}},{"id":"8c196155-c435-3c86-8e39-fc1dea1d2cd4","product":{"name":"3.0","vendor":{"name":"Wind River"}}},{"id":"c32a6063-127d-3745-a8d1-be66922ed58d","product":{"name":"azl3 tar 0:1.35-2.azl3","vendor":{"name":"Microsoft"}}}]}}]}