CVE-2026-39414
MinIO affected a DoS via Unbounded Memory Allocation in S3 Select CSV Parsing
描述
MinIO is a high-performance object storage system. From RELEASE.2018-08-18T03-49-57Z to before RELEASE.2025-12-20T04-58-37Z, MinIO's S3 Select feature is vulnerable to memory exhaustion when processing CSV files containing lines longer than available memory. The CSV reader's nextSplit() function calls bufio.Reader.ReadBytes('\n') with no size limit, buffering the entire input in memory until a newline is found. A CSV file with no newline characters causes the entire contents to be read into a single allocation, leading to an OOM crash of the MinIO server process. This is exploitable by any authenticated user with s3:PutObject and s3:GetObject permissions. The attack is especially practical when combined with compression: a ~2 MB gzip-compressed CSV can decompress to gigabytes of data without newlines, allowing a small upload to cause large memory consumption on the server. However, compression is not required — a sufficiently large uncompressed CSV with no newlines triggers the same issue.
如何修補 CVE-2026-39414
要修補 CVE-2026-39414,請將受影響套件升級到下列已修補版本。
- —升級至 2026.04.10 或更新版本
- —未列出修補版本
- —未列出修補版本
CVE-2026-39414 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- >= 2018.08.18, < 2026.04.10
- >= 0.0.0-20180815103019-7c14cdb60e53, <= 0.0.0-20251203081239-27742d469462
- >= 0.0.0-20180815103019-7c14cdb60e53
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |