{"id":"CVE-2022-26652","aliases":["BIT-nats-2022-26652","EUVD-2022-1345","GHSA-6h3m-36w8-hv68","GO-2022-0351"],"status":"published","title":"Arbitrary file write in nats-server","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02342,"percentile":0.83746,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2022-03-10T03:48:44Z","modified":"2026-10-28T02:30:53Z","fixes":[{"ecosystem":"Go","package":"github.com/nats-io/nats-server/v2","fixed_in":["2.7.4"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/nats-io/nats-streaming-server","fixed_in":["0.24.3"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"nats","fixed_in":["2.7.4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/nats-io/nats-server/v2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.7.4"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/nats-io/nats-streaming-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.15.0"},{"fixed":"0.24.3"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"nats","ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.7.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/nats-io/nats-server/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.7.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/nats-io/nats-streaming-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0.15.0"},{"fixed":"0.24.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/nats-io/nats-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/nats-io/nats-server/v2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.7.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/nats-io/nats-streaming-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0.15.0"},{"fixed":"0.24.3"}]}]}],"products":[{"vendor":"linuxfoundation","product":"nats-server"},{"vendor":"nats","product":"nats_streaming_server"}],"references":[{"url":"https://github.com/nats-io/nats-server/releases","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","web","package"]},{"url":"https://github.com/nats-io/nats-server/security/advisories/GHSA-6h3m-36w8-hv68","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://advisories.nats.io/CVE/CVE-2022-26652.txt","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","web","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2022/03/10/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","web","article"]},{"url":"https://github.com/nats-io/nats-server/pull/2917","tags":["web","fix"]},{"url":"https://github.com/nats-io/nats-server/releases/tag/v2.7.4","tags":["web"]},{"url":"https://github.com/nats-io/nats-streaming-server/releases/tag/v0.24.3","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26652","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-6h3m-36w8-hv68"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/26xxx/CVE-2022-26652.json","tags":["advisory"]},{"url":"https://github.com/nats-io/nats-server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-26652","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","status":"published","published":"2022-03-10T03:48:44Z","modified":"2024-08-03T05:11:44.439Z","updated_at":"2026-11-02T14:34:25.954329Z"}],"euvd":[{"id":"EUVD-2022-1345","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","status":"published","published":"2022-03-10T03:48:44Z","modified":"2024-08-03T05:11:44Z","updated_at":"2026-11-03T03:25:44.694159Z"}],"ghsa":[{"id":"GHSA-6h3m-36w8-hv68","title":"Arbitrary file write in nats-server","description":"(This document is canonically: \u003chttps://advisories.nats.io/CVE/CVE-2022-26652.txt\u003e)\n\n## Background\n\nNATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.\n\nJetStream is the optional RAFT-based resilient persistent feature of NATS.\n\n\n## Problem Description\n\nThe JetStream streams can be backed up and restored via NATS. The backup format is a tar archive file.  Inadequate checks on the filenames within the archive file permit a so-called \"Zip Slip\" attack in the stream restore.\n\nNATS nats-server through 2022-03-09 (fixed in release 2.7.4) did not correctly sanitize elements of the archive file, thus a user of NATS\ncould cause the NATS server to write arbitrary content to an attacker-controlled filename.\n\n\n## Affected versions\n\nNATS Server:\n * 2.2.0 up to and including 2.7.3.\n   + Introduced with JetStream Restore functionality\n * Fixed with nats-io/nats-server: 2.7.4\n * Docker image:  nats \u003chttps://hub.docker.com/_/nats\u003e\n * NB users of OS package files from our releases: a change in goreleaser defaults, discovered late in the release process, moved the install directory from /usr/local/bin to /usr/bin; we are evaluating the correct solution for subsequent releases, but not recutting this release.\n\nNATS Streaming Server\n * 0.15.0 up to and including 0.24.2\n * Fixed with nats-io/nats-streaming-server: 0.24.3\n * Embeds a nats-server, but this server is the old approach which JetStream replaces, so unlikely (but not impossible) to be\n   configured with JS support\n\n\n## Workarounds\n\n * Disable JetStream for untrusted users.\n * If only one NATS account uses JetStream, such that cross-user attacks are not an issue, and any user in that account with access to the JetStream API is fully trusted anyway, then appropriate sandboxing techniques will prevent exploit.\n   + Eg, with systemd, the supplied util/nats-server-hardened.service example configuration demonstrates that NATS runs fine as an unprivileged user under ProtectSystem=strict and PrivateTmp=true restrictions; by only opening a ReadWritePaths hole for the JetStream storage area, the impact of this vulnerability is limited.\n\n\n## Solution\n\nUpgrade the NATS server to at least 2.7.4.\n\nWe fully support the util/nats-server-hardened.service configuration for running a NATS server and encourage this approach.\n\n\n## Credits\n\nThis issue was reported (on 2022-03-07) to the NATS Maintainers by\nYiming Xiang, TIANJI LAB of NSFOCUS.  \nThank you / 谢谢你！\n","status":"published","published":"2022-03-10T22:07:30Z","modified":"2023-02-03T05:06:49Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:36:44.093794Z"}],"nvd":[{"id":"CVE-2022-26652","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","status":"published","published":"2022-03-10T17:47:51.47Z","modified":"2026-06-17T04:35:35.63Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:07:13.7085Z"}],"osv":[{"id":"GHSA-6h3m-36w8-hv68","title":"Arbitrary file write in nats-server","description":"(This document is canonically: \u003chttps://advisories.nats.io/CVE/CVE-2022-26652.txt\u003e)\n\n## Background\n\nNATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.\n\nJetStream is the optional RAFT-based resilient persistent feature of NATS.\n\n\n## Problem Description\n\nThe JetStream streams can be backed up and restored via NATS. The backup format is a tar archive file.  Inadequate checks on the filenames within the archive file permit a so-called \"Zip Slip\" attack in the stream restore.\n\nNATS nats-server through 2022-03-09 (fixed in release 2.7.4) did not correctly sanitize elements of the archive file, thus a user of NATS\ncould cause the NATS server to write arbitrary content to an attacker-controlled filename.\n\n\n## Affected versions\n\nNATS Server:\n * 2.2.0 up to and including 2.7.3.\n   + Introduced with JetStream Restore functionality\n * Fixed with nats-io/nats-server: 2.7.4\n * Docker image:  nats \u003chttps://hub.docker.com/_/nats\u003e\n * NB users of OS package files from our releases: a change in goreleaser defaults, discovered late in the release process, moved the install directory from /usr/local/bin to /usr/bin; we are evaluating the correct solution for subsequent releases, but not recutting this release.\n\nNATS Streaming Server\n * 0.15.0 up to and including 0.24.2\n * Fixed with nats-io/nats-streaming-server: 0.24.3\n * Embeds a nats-server, but this server is the old approach which JetStream replaces, so unlikely (but not impossible) to be\n   configured with JS support\n\n\n## Workarounds\n\n * Disable JetStream for untrusted users.\n * If only one NATS account uses JetStream, such that cross-user attacks are not an issue, and any user in that account with access to the JetStream API is fully trusted anyway, then appropriate sandboxing techniques will prevent exploit.\n   + Eg, with systemd, the supplied util/nats-server-hardened.service example configuration demonstrates that NATS runs fine as an unprivileged user under ProtectSystem=strict and PrivateTmp=true restrictions; by only opening a ReadWritePaths hole for the JetStream storage area, the impact of this vulnerability is limited.\n\n\n## Solution\n\nUpgrade the NATS server to at least 2.7.4.\n\nWe fully support the util/nats-server-hardened.service configuration for running a NATS server and encourage this approach.\n\n\n## Credits\n\nThis issue was reported (on 2022-03-07) to the NATS Maintainers by\nYiming Xiang, TIANJI LAB of NSFOCUS.  \nThank you / 谢谢你！\n","status":"published","published":"2022-03-10T22:07:30Z","modified":"2026-07-08T06:29:51.186865744Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:39.618611Z"},{"id":"BIT-nats-2022-26652","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","status":"published","published":"2024-03-06T10:58:12.167Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:34.007508Z"},{"id":"CVE-2022-26652","description":"NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.","status":"published","published":"2022-03-10T03:48:44Z","modified":"2026-10-28T02:30:53.668119275Z","updated_at":"2026-11-02T15:44:24.758293Z"},{"id":"GO-2022-0351","title":"Arbitrary file write in nats-server in github.com/nats-io/nats-server","description":"Arbitrary file write in nats-server in github.com/nats-io/nats-server","status":"published","published":"2024-08-21T14:30:29Z","modified":"2026-03-03T04:50:02.887708Z","updated_at":"2026-11-02T15:47:00.604718Z"}]}}