CVE-2026-48044— Envoy Zstd解压器循环深度错误导致内存爆炸
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I. CVE-2026-48044の基本情報
脆弱性情報
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脆弱性タイトル
Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion
ソース: NVD (National Vulnerability Database)
脆弱性説明
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
ソース: NVD (National Vulnerability Database)
CVSS情報
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
ソース: NVD (National Vulnerability Database)
脆弱性タイプ
对高度压缩数据的处理不恰当(数据放大攻击)
ソース: NVD (National Vulnerability Database)
影響を受ける製品
| ベンダー | プロダクト | 影響を受けるバージョン | CPE | 購読 |
|---|---|---|---|---|
| envoyproxy | envoy | >= 1.38.0, < 1.38.1 | - |
II. CVE-2026-48044の公開POC
| # | POC説明 | ソースリンク | Shenlongリンク |
|---|
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CVE-2026-48044 其他参考 (1)
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wgx_refsource_CONFIRM
Same Patch Batch · envoyproxy · 2026-06-26 · 11 CVEs total
| CVE-2026-48743 | 7.5 HIGH | Envoy: HTTP/3 to HTTP/1 request smuggling via headers-only request with nonzero Content-Le |
| CVE-2026-48042 | 7.5 HIGH | Envoy: Stack overflow in destructor of highly nested JSON |
| CVE-2026-47775 | 6.8 MEDIUM | Envoy OAuth2 Filter: Padding Oracle via AES-256-CBC Cookie Decryption |
| CVE-2026-47204 | 6.5 MEDIUM | Envoy: grpc_stats filter segfault on Connect protocol requests to direct_response routes |
| CVE-2026-47207 | 6.5 MEDIUM | Envoy crashes if multiple unexpected ext_proc responses are packed into one gRPC message |
| CVE-2026-47221 | 5.9 MEDIUM | Envoy: Null pointer deref in internal redirects |
| CVE-2026-48497 | 5.9 MEDIUM | Envoy: Abnormal process termination in DNS UDP filter |
| CVE-2026-48706 | 5.9 MEDIUM | Envoy Heap Buffer Overflow in TcpStatsdSink |
| CVE-2026-47692 | 4.8 MEDIUM | Envoy: PROXY Protocol v2 header generator emits "skipped" TLVs, causing 65 KB attacker-con |
| CVE-2026-47778 | 4.4 MEDIUM | Envoy: Embedded NUL in TLS DNS SAN Truncation in the Default TLS Certificate Validator. (A |
IV. 関連脆弱性
同じ製品: envoy
- CVE-2026-47692
Envoy: PROXY Protocol v2 header generator emits "skipped" TL - CVE-2026-47207
Envoy crashes if multiple unexpected ext_proc responses are - CVE-2026-48706
Envoy Heap Buffer Overflow in TcpStatsdSink - CVE-2026-47204
Envoy: grpc_stats filter segfault on Connect protocol reques - CVE-2026-47221
Envoy: Null pointer deref in internal redirects
同じベンダー: envoyproxy
- CVE-2026-47692
Envoy: PROXY Protocol v2 header generator emits "skipped" TL - CVE-2026-47207
Envoy crashes if multiple unexpected ext_proc responses are - CVE-2026-48706
Envoy Heap Buffer Overflow in TcpStatsdSink - CVE-2026-47204
Envoy: grpc_stats filter segfault on Connect protocol reques - CVE-2026-47221
Envoy: Null pointer deref in internal redirects
同じ弱点: CWE-409
- CVE-2026-44018
Docling: Unsafe Archive Extraction and XML Parsing in METS-G - CVE-2026-54314
n8n: Denial of Service via ZIP decompression in webhook work - CVE-2026-54233
vLLM: OOM Denial of Service via Audio Decompression Bomb - CVE-2026-48510
MessagePack-CSharp: LZ4 decompression allocates from unbound - CVE-2026-54278
AIOHTTP: Unread Compressed Request Bodies Bypass client_max_
V. CVE-2026-48044へのコメント
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