CVE-2026-11403Network attack vector

Account impersonation via low-entropy API key generation

Published Jul 14, 2026 · Updated Jul 14, 2026

Insufficient entropy in Sonatype Nexus Repository before 3.93.0 allows remote attackers to recover a targeted user's format-specific API key. The undisclosed key-generation algorithm produces NuGet, Docker, npm, and Conan credentials with too little entropy, making a key recoverable from a valid username. Exploitation requires an enabled NuGet API Key, Docker Bearer Token, or npm Bearer Token realm and an active key for the target; recovered credentials permit repository reads and, with publish rights, writes.

CVSS severity8.7
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in Sonatype Nexus Repository before 3.93.0 allows remote attackers to recover a targeted user's format-specific API key. The undisclosed key-generation algorithm produces NuGet, Docker, npm, and Conan credentials with too little entropy, making a key recoverable from a valid username. Exploitation requires an enabled NuGet API Key, Docker Bearer Token, or npm Bearer Token realm and an active key for the target; recovered credentials permit repository reads and, with publish rights, writes.

The record

CVE
CVE-2026-11403
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Sonatype
Product
Nexus Repository
Classifications
CWE-331, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0.0 <3.93.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sonatype · Nexus Repositoryversion=3.0.0 <3.93.0

Published CVSS scores

8.7SonatypeCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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