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CVE-2026-77121— Nexus Repository 3 - Denial of Service via Unbounded Maven POM Metadata Fields

Quick assessment

Affected
Sonatype Nexus Repository 3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sonatype Nexus Repository Manager是美国Sonatype公司的一个管理软件仓库的工具。 Sonatype Nexus Repository Manager 3.26.0版本至3.95.0之前版本存在资源管理错误漏洞，该漏洞源于向托管的Maven仓库上传包含超大元数据字段的POM文件，可能导致目标仓库的组件列表或浏览功能永久失败。

CVSS 5.3 · Medium EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1595.001 · Scanning IP Blocks

Affected Version Matrix 1

VendorProduct Version RangeStatus
Sonatype Nexus Repository 3 3.26.0< 3.95.0 affected
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I. Basic Information for CVE-2026-77121

Vulnerability Information
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Vulnerability Title
Nexus Repository 3 - Denial of Service via Unbounded Maven POM Metadata Fields
Source: CVE Program / CVE List V5
Vulnerability Description
A user account with permission to deploy artifacts to a hosted Maven repository could upload a POM file containing an oversized metadata field. This causes future attempts to list or browse that repository's components to permanently fail until an administrator repairs the underlying data. Only the targeted repository is affected; other repositories and overall server health remain unaffected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Sonatype Nexus Repository Manager 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sonatype Nexus Repository Manager是美国Sonatype公司的一个管理软件仓库的工具。 Sonatype Nexus Repository Manager 3.26.0版本至3.95.0之前版本存在资源管理错误漏洞，该漏洞源于向托管的Maven仓库上传包含超大元数据字段的POM文件，可能导致目标仓库的组件列表或浏览功能永久失败。
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
Sonatype Nexus Repository 3 3.26.0 ~ 3.95.0 cpe:2.3:a:sonatype:nexus_repository_manager:3.26.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-77121

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III. Intelligence Information for CVE-2026-77121

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Vendor Advisories for CVE-2026-77121 (1)

Vendor Pages for CVE-2026-77121 (1)

Same Patch Batch · Sonatype · 2026-09-02 · 5 CVEs total

CVE-2026-77124 7.5 HIGH Nexus Repository 3 - Script Execution Disable Setting Not Enforced
CVE-2026-77125 7.1 HIGH Nexus Repository 3 - Incorrect Authorization on Blobstore Group Endpoints
CVE-2026-77123 6.0 MEDIUM Nexus Repository 3 - Webhook Secret Disclosure via Capability Read API
CVE-2026-77122 5.3 MEDIUM Nexus Repository 3 - Incorrect Authorization Allows Disclosure of Member Repository Metada

IV. Related Vulnerabilities

Same product: Nexus Repository 3
Same vendor: Sonatype
Same weakness: CWE-770

V. Comments for CVE-2026-77121

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