Vulnerability from bitnami_vulndb
rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.75.0 until 1.75.1, the serve S3 streamed multipart path in cmd/serve/s3/multipart.go passes attacker-controlled contentLength to multipart.NewRW().Reserve before reading request-body bytes. waitForTurn admits the current part and one oversized part when the buffer is empty despite --multipart-streaming-buffer-limit, and lib/pool allocates 1 MiB pages according to Content-Length or X-Amz-Decoded-Content-Length. A network client can retain or multiply these reservations without sending the declared body, exhausting process or host memory or permanently blocking request handlers. Anonymous S3 deployments require no credentials, while deployments using auth_key require an accepted S3 key. This issue is fixed in version 1.75.1.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "rclone",
"purl": "pkg:bitnami/rclone"
},
"ranges": [
{
"events": [
{
"introduced": "1.75.0"
},
{
"fixed": "1.75.1"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2026-88045"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:rclone:rclone:*:*:*:*:*:go:*:*"
],
"severity": "High"
},
"details": "rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.75.0 until 1.75.1, the serve S3 streamed multipart path in cmd/serve/s3/multipart.go passes attacker-controlled contentLength to multipart.NewRW().Reserve before reading request-body bytes. waitForTurn admits the current part and one oversized part when the buffer is empty despite --multipart-streaming-buffer-limit, and lib/pool allocates 1 MiB pages according to Content-Length or X-Amz-Decoded-Content-Length. A network client can retain or multiply these reservations without sending the declared body, exhausting process or host memory or permanently blocking request handlers. Anonymous S3 deployments require no credentials, while deployments using auth_key require an accepted S3 key. This issue is fixed in version 1.75.1.",
"id": "BIT-rclone-2026-88045",
"modified": "2026-09-19T09:02:05.474Z",
"published": "2026-09-19T08:49:53.566Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rclone/rclone/commit/7c1dfd99f3e6a22fcefd8686cc478226a15e63a1"
},
{
"type": "WEB",
"url": "https://github.com/rclone/rclone/commit/ab1f458013aaf6356e4bdeca61f7cb9139f8eb86"
},
{
"type": "WEB",
"url": "https://github.com/rclone/rclone/issues/9616"
},
{
"type": "WEB",
"url": "https://github.com/rclone/rclone/releases/tag/v1.75.1"
},
{
"type": "WEB",
"url": "https://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88045"
}
],
"schema_version": "1.6.2",
"summary": "rclone: S3 multipart declared-length memory exhaustion"
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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