CVE-2026-8202— Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators
Possible ATT&CK Techniques 1AI
T1496 · Resource HijackingAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MongoDB, Inc. | MongoDB Server | 7.0< 7.0.34 | affected |
8.0< 8.0.23 | affected | ||
8.2< 8.2.9 | affected | ||
8.3< 8.3.2 | affected |
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I. Basic Information for CVE-2026-8202
Vulnerability Information
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Vulnerability Title
Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators
Source: NVD (National Vulnerability Database)
Vulnerability Description
Using a densely populated chars mask and a large input string in the MongoDB aggregation operators $trim, $ltrim, and $rtrim, an authenticated user with aggregation permissions can pin CPU utilization at 100% for an extended period of time. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
MongoDB Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB Server是美国MongoDB公司的一套开源的NoSQL数据库。该数据库提供面向集合的存储、动态查询、数据复制及自动故障转移等功能。 MongoDB Server 7.0.34之前版本、8.0.23之前版本、8.2.9之前版本和8.3.2之前版本存在安全漏洞，该漏洞源于使用密集填充的字符掩码和大型输入字符串时，可能导致具有聚合权限的认证用户长时间将CPU利用率固定在100%。
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 |
|---|---|---|---|---|
| MongoDB, Inc. | MongoDB Server | 7.0 ~ 7.0.34 | - |
II. Public POCs for CVE-2026-8202
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://jira.mongodb.org/browse/SERVER-120668issue-tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-8202
Same Patch Batch · MongoDB, Inc. · 2026-05-13 · 5 CVEs total
| CVE-2026-8336 | 7.5 HIGH | Post-authentication use-after-free error in $_internalJsEmit and mapreduce commands |
| CVE-2026-8199 | 6.5 MEDIUM | Post-auth memory exhaustion via bitwise match expressions |
| CVE-2026-8201 | 6.4 MEDIUM | Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Enc |
| CVE-2026-8200 | 2.7 LOW | Schema validation log messages may not redact user data |
IV. Related Vulnerabilities
Same product: MongoDB Server
- CVE-2026-8336
Post-authentication use-after-free error in $_internalJsEmit - CVE-2026-8201
Use-After-Free in MongoDB FLE Query Analysis When Processing - CVE-2026-8200
Schema validation log messages may not redact user data - CVE-2026-8199
Post-auth memory exhaustion via bitwise match expressions - CVE-2026-8053
FlatBSON Duplicate Field Index Drift
Same vendor: MongoDB, Inc.
- CVE-2026-8336
Post-authentication use-after-free error in $_internalJsEmit - CVE-2026-8201
Use-After-Free in MongoDB FLE Query Analysis When Processing - CVE-2026-8200
Schema validation log messages may not redact user data - CVE-2026-8199
Post-auth memory exhaustion via bitwise match expressions - CVE-2026-8053
FlatBSON Duplicate Field Index Drift
Same weakness: CWE-770
- CVE-2021-47959
WordPress Plugin WPGraphQL 1.3.5 Denial of Service - CVE-2026-44679
Tuist: Forgot password flow lacks throttling for reset email - CVE-2026-44216
Wasmtime: Panic when allocating a table exceeding the size o - CVE-2026-8468
Unbounded buffer accumulation in multipart header parsing ca - CVE-2025-14870
Allocation of Resources Without Limits or Throttling in GitL
V. Comments for CVE-2026-8202
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