{"id":"GHSA-p6m2-r3w9-mpxw","revision":null,"records":[{"revision":"0c059341423846e498463a9c1868c02b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-88015","aliases":[],"title":"rclone local: crafted Range request against a translated symlink panics (DoS)","description":"rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decode can pass an unchecked positive Range start through Object.Open and openTranslatedLink. The function slices the target string as linkdst[offset:], so a Range start larger than the target length causes a deterministic slice-bounds panic when lib/http/serve exposes the object through HTTP or WebDAV. Go net/http normally recovers the panic per connection, causing request-level denial of service rather than terminating the entire process. This issue is fixed in version 1.75.1.","state":0,"publishedAt":"2026-09-10T15:50:41.414+00:00","modifiedAt":"2026-09-10T16:01:48.11+00:00","affected":[{"ecosystem":"Vendor product","name":"rclone","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"rclone\",\n                    \"product\": \"rclone\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.75.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-p6m2-r3w9-mpxw","https://github.com/rclone/rclone/commit/28bf49d66f94acc3f4f7f318504a706686281af9","https://github.com/rclone/rclone/releases/tag/v1.75.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-88015","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-88015","identifiers":["CVE-2026-88015"]},"retained":false,"historicalAffected":[]},{"revision":"2fc86a0cfc544f9ea29d288333f7fa1c","observedAt":"2026-11-11T17:03:18.237+00:00","statement":{"source":"euvd","id":"EUVD-2026-75575","aliases":["CVE-2026-88015","GHSA-p6m2-r3w9-mpxw"],"title":"rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decod…","description":"rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decode can pass an unchecked positive Range start through Object.Open and openTranslatedLink. The function slices the target string as linkdst[offset:], so a Range start larger than the target length causes a deterministic slice-bounds panic when lib/http/serve exposes the object through HTTP or WebDAV. Go net/http normally recovers the panic per connection, causing request-level denial of service rather than terminating the entire process. This issue is fixed in version 1.75.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":null}],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-p6m2-r3w9-mpxw","https://github.com/rclone/rclone/commit/28bf49d66f94acc3f4f7f318504a706686281af9","https://github.com/rclone/rclone/releases/tag/v1.75.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75575","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 10, 2026, 3:50:41 PM","dateUpdated":"Sep 10, 2026, 4:01:48 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. 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Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decode can pass an unchecked positive Range start through Object.Open and openTranslatedLink. The function slices the target string as linkdst[offset:], so a Range start larger than the target length causes a deterministic slice-bounds panic when lib/http/serve exposes the object through HTTP or WebDAV. Go net/http normally recovers the panic per connection, causing request-level denial of service rather than terminating the entire process. This issue is fixed in version 1.75.1.","state":0,"publishedAt":"2026-09-10T16:18:08.49+00:00","modifiedAt":"2026-09-23T20:42:27.633+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/rclone/rclone/commit/28bf49d66f94acc3f4f7f318504a706686281af9","https://github.com/rclone/rclone/releases/tag/v1.75.1","https://github.com/rclone/rclone/security/advisories/GHSA-p6m2-r3w9-mpxw"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88015","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-190","CWE-248"],"productCriteria":["cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-09-10T16:18:08.490","lastModified":"2026-09-23T20:42:27.633"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-88015","identifiers":["CVE-2026-88015"]},"retained":false,"historicalAffected":[]},{"revision":"38afcdd71a2747b491eb0a5f39f05988","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-p6m2-r3w9-mpxw","aliases":["BIT-rclone-2026-88015","CVE-2026-88015","GO-2026-6461"],"title":"rclone local: crafted Range request against a translated symlink panics (DoS)","description":"### Summary\nWhen `backend/local` is used with `--links`/`-l` (or the `links=true` config option), each symlink is exposed as an rclone object whose content is the target path string, suffixed `.rclonelink`. `Object.Open()` decodes an incoming `fs.RangeOption` via `Decode(o.Size())`, then for a translated-symlink object passes the decoded `offset` straight into `openTranslatedLink`, which indexes the target string directly: `linkdst[offset:]`.\n\n`RangeOption.Decode`'s `Start >= 0` branch (an ordinary `Range: bytes=X-` request) sets `offset = o.Start` with no upper bound, unlike its suffix-range branch (`Start < 0`, e.g. `bytes=-N`), which already clamps a too-large value to 0 - the fix for a prior, related crash (issue #6310: \"bytes=-90407\" against a 5-byte object panicked with \"slice bounds out of range\", now covered by an existing regression test). The `Start >= 0` branch never received the analogous protection.\n\nA `Range: bytes=<hugeStart>-` request sent to `rclone serve http`/`webdav` (or any consumer of `lib/http/serve`'s `Object()`, which parses and decodes the client's own Range header) against a directory containing a symlink therefore reaches `linkdst[offset:]` with offset far beyond the target string's length, and Go panics with \"slice bounds out of range\" instead of returning an empty read.\n\n### Details\nVulnerable code (before fix):\n```go\nfunc (o *Object) openTranslatedLink(offset, limit int64) (lrc io.ReadCloser, err error) {\n\tlinkdst, err := os.Readlink(o.path)\n\tif err != nil { return nil, err }\n\treturn readers.NewLimitedReadCloser(io.NopCloser(strings.NewReader(linkdst[offset:])), limit), nil\n}\n```\n\n### PoC\nCalled the real production `Object.Open()` on a translated-symlink object (target length 12) with `&fs.RangeOption{Start: math.MaxInt64, End: -1}`:\n```\npanic: runtime error: slice bounds out of range [9223372036854775807:8]\n  ...backend/local.(*Object).openTranslatedLink\n  ...backend/local.(*Object).Open\n```\n\n### Impact\nA remote client can send a single crafted `Range` header against any symlink-backed object exposed by `rclone serve http`/`webdav`/etc (backed by `backend/local` with `--links` enabled) to deterministically panic the request-handling goroutine. Go's `net/http` recovers panics per-connection by default, so this fails the one request/connection rather than crashing the whole server process, and no file handle is left open (the panic occurs before any read handle is acquired) - but it is fully deterministic and remotely triggerable with no authentication or race window needed, unlike some other panic-recovery findings.\n\n### Fix\nClamp `offset` to the length of the target string before slicing, matching how a real file read past EOF behaves (an empty read):\n```go\nif offset > int64(len(linkdst)) {\n\toffset = int64(len(linkdst))\n}\n```\nNote: the shared `RangeOption.Decode()` also has a related, unaddressed issue - `limit = o.End - o.Start + 1` can itself overflow to a large negative number for a huge `End` - but a fix attempted there during this investigation broke `fs/operations/reopen.go`'s `NewReOpen`, which calls `Decode` with its `h.end` field still at its zero value at that point in construction. Flagged for awareness but not changed here to keep this patch minimal and low-risk.","state":0,"publishedAt":"2026-09-10T22:49:27+00:00","modifiedAt":"2026-09-19T09:25:32.6764408+00:00","affected":[{"ecosystem":"Go","name":"github.com/rclone/rclone","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.75.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-p6m2-r3w9-mpxw","https://nvd.nist.gov/vuln/detail/CVE-2026-88015","https://github.com/rclone/rclone/commit/28bf49d66f94acc3f4f7f318504a706686281af9","https://github.com/rclone/rclone","https://github.com/rclone/rclone/releases/tag/v1.75.1"],"sourceUrl":"https://github.com/advisories/GHSA-p6m2-r3w9-mpxw","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-p6m2-r3w9-mpxw","identifiers":["GHSA-p6m2-r3w9-mpxw","BIT-rclone-2026-88015","CVE-2026-88015","GO-2026-6461"]},"retained":false,"historicalAffected":[]},{"revision":"bc1def0bc27e444084b31766d66af3b2","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6461","aliases":["BIT-rclone-2026-88015","CVE-2026-88015","GHSA-p6m2-r3w9-mpxw"],"title":"rclone local: crafted Range request against a translated symlink panics (DoS) in github.com/rclone/rclone","description":"rclone local: crafted Range request against a translated symlink panics (DoS) in github.com/rclone/rclone","state":0,"publishedAt":"2026-09-16T16:56:29+00:00","modifiedAt":"2026-09-19T09:25:32.6764408+00:00","affected":[{"ecosystem":"Go","name":"github.com/rclone/rclone","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.75.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-p6m2-r3w9-mpxw","https://nvd.nist.gov/vuln/detail/CVE-2026-88015","https://github.com/rclone/rclone/commit/28bf49d66f94acc3f4f7f318504a706686281af9","https://github.com/rclone/rclone/releases/tag/v1.75.1"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6461","license":"OSV · upstream source license applies","key":"osv:GO-2026-6461","identifiers":["GO-2026-6461","BIT-rclone-2026-88015","CVE-2026-88015","GHSA-p6m2-r3w9-mpxw"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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