{"id":"CVE-2026-48855","revision":null,"records":[{"revision":"9157f673aa674fa88d9401eada6900f9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48855","aliases":[],"title":"SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured","description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery.\n\nThe SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /.\n\nThe information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.\n\nThis issue affects OTP from OTP\u00A017.0 before OTP\u00A027.3.4.13, OTP\u00A028.5.0.2, and OTP\u00A029.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP\u00A017.0, corresponding to ssh before 3.0.1, is affected is unknown.","state":0,"publishedAt":"2026-06-10T14:35:49.683+00:00","modifiedAt":"2026-09-24T20:35:33.97+00:00","affected":[{"ecosystem":"Vendor product","name":"otp","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"cpes\": [\n \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unknown\",\n \"modules\": [\n \"ssh_sftpd\"\n ],\n \"packageName\": \"otp\",\n \"packageURL\": \"pkg:software-id/erlang.org/otp\",\n \"product\": \"OTP\",\n \"programFiles\": [\n \"lib/ssh/src/ssh_sftpd.erl\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"ssh_sftpd:handle_op/4\"\n }\n ],\n \"vendor\": \"Erlang\",\n \"versions\": [\n {\n \"changes\": [\n {\n \"at\": \"27.3.4.13\",\n \"status\": \"unaffected\"\n },\n {\n \"at\": \"28.5.0.2\",\n \"status\": \"unaffected\"\n },\n {\n \"at\": \"29.0.2\",\n \"status\": \"unaffected\"\n }\n ],\n \"lessThan\": \"*\",\n \"status\": \"affected\",\n \"version\": \"17.0\",\n \"versionType\": \"otp\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"ssh","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"cpes\": [\n \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unknown\",\n \"modules\": [\n \"ssh_sftpd\"\n ],\n \"packageName\": \"ssh\",\n \"packageURL\": \"pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git\",\n \"product\": \"OTP\",\n \"programFiles\": [\n \"src/ssh_sftpd.erl\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"ssh_sftpd:handle_op/4\"\n }\n ],\n \"repo\": \"https://github.com/erlang/otp\",\n \"vendor\": \"Erlang\",\n \"versions\": [\n {\n \"changes\": [\n {\n \"at\": \"5.2.11.8\",\n \"status\": \"unaffected\"\n },\n {\n \"at\": \"5.5.2.1\",\n \"status\": \"unaffected\"\n },\n {\n \"at\": \"6.0.1\",\n \"status\": \"unaffected\"\n }\n ],\n \"lessThan\": \"*\",\n \"status\": \"affected\",\n \"version\": \"3.0.1\",\n \"versionType\": \"otp\"\n }\n ]\n }"},{"ecosystem":"https://github.com","name":"erlang/otp","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"collectionURL\": \"https://github.com\",\n \"cpes\": [\n \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unknown\",\n \"modules\": [\n \"ssh_sftpd\"\n ],\n \"packageName\": \"erlang/otp\",\n \"packageURL\": \"pkg:github/erlang/otp\",\n \"product\": \"OTP\",\n \"programFiles\": [\n \"lib/ssh/src/ssh_sftpd.erl\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"ssh_sftpd:handle_op/4\"\n }\n ],\n \"repo\": \"https://github.com/erlang/otp\",\n \"vendor\": \"Erlang\",\n \"versions\": [\n {\n \"lessThan\": \"8f4224a0d2676b0653d2c71a889a956e8c2c62d6\",\n \"status\": \"affected\",\n \"version\": \"08225797f7ef943d0c82a1d9dd6650d94ca2580d\",\n \"versionType\": \"git\"\n },\n {\n \"lessThan\": \"*\",\n \"status\": \"unaffected\",\n \"version\": \"8f4224a0d2676b0653d2c71a889a956e8c2c62d6\",\n \"versionType\": \"git\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":2.3,"severity":"LOW"}],"references":["https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh","https://cna.erlef.org/cves/CVE-2026-48855.html","https://osv.dev/vulnerability/EEF-CVE-2026-48855","https://www.erlang.org/doc/system/versions.html#order-of-versions","https://github.com/erlang/otp/commit/08225797f7ef943d0c82a1d9dd6650d94ca2580d","https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48855","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48855","identifiers":["CVE-2026-48855"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-12T11:55:28.1860721+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-12T11:55:28.1860721+00:00","lastSuccessAt":"2026-11-12T11:55:28.4130785+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.4130791+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-64752486c567b55b31fb0d7225f5222bcd0019564ac0ac5f0649e242c7b19299-4a4604796d7c0adea2c1c677026f25a1e039e4a95710b02ad846575329daaa79","complete":true,"records":424651,"lastAttemptAt":"2026-11-12T11:53:33.8199862+00:00","lastSuccessAt":"2026-11-12T11:53:33.7811873+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:53:33.8199862+00:00","snapshotPublishedAt":"2026-11-12T11:27:22+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-0580dcc98aaa46a8935f8ff576f25037","complete":true,"records":13764,"lastAttemptAt":"2026-11-12T11:56:20.2141865+00:00","lastSuccessAt":"2026-11-12T11:56:20.209+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:56:20.209+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13817,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T11:55:28.1860721+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T11:55:28.1860721+00:00","lastSuccessAt":"2026-11-12T11:55:28.4142299+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.4142304+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ea8d0b9744d8407d9df5932458afeb6a","complete":false,"records":13764,"lastAttemptAt":"2026-11-12T11:55:53.6222651+00:00","lastSuccessAt":"2026-11-12T11:55:53.618+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:53.618+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13313,"expectedIdentifiers":13817,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-12T11:55:28.0344457+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.0344457+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-12T11:53:33.8856695+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:53:33.8856695+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f46f74c6a30a9b6e4cfb481719c6d35521ebec2d53ebf163223d093ae587eb9d","complete":true,"records":3106,"lastAttemptAt":"2026-11-12T11:55:28.1484531+00:00","lastSuccessAt":"2026-11-12T09:55:31.1176285+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:28.1484531+00:00","snapshotPublishedAt":"2026-11-12T09:48:13+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e59fd13399d7070c31f5f25102a6bcd537ccba91d773c8427fcf0d07ea0fe2d5","complete":true,"records":231700,"lastAttemptAt":"2026-11-12T11:55:27.8998515+00:00","lastSuccessAt":"2026-11-12T11:55:26.4268762+00:00","error":null,"lastVerifiedAt":"2026-11-12T11:55:27.8998515+00:00","snapshotPublishedAt":"2026-11-12T11:33:13+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}