CVE-2026-42154— Prometheus: remote read endpoint allows denial of service via crafted snappy payload
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I. Basic Information for CVE-2026-42154
Vulnerability Information
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Vulnerability Title
Prometheus: remote read endpoint allows denial of service via crafted snappy payload
Source: NVD (National Vulnerability Database)
Vulnerability Description
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Prometheus 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Prometheus是Prometheus开源的一款使用Go语言编写的、用于记录使用HTTP拉模型构建的时间序列数据库中实时指标的开源软件。 Prometheus 3.5.3之前版本和3.11.3之前版本存在资源管理错误漏洞，该漏洞源于远程读取端点未验证snappy压缩请求体中声明的解码长度，可能导致未认证攻击者发送小有效载荷造成大量堆分配并耗尽内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| prometheus | prometheus | < 3.5.3 | - |
II. Public POCs for CVE-2026-42154
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|---|
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- Release 3.5.3 / 2026-04-27 · prometheus/prometheus · GitHubx_refsource_MISC
- Release 3.11.3 / 2026-04-27 · prometheus/prometheus · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42154
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