CVE-2026-44592Public exploitNetwork attack vector

Cache poisoning via unauthenticated worker admission

Published May 14, 2026 · Updated May 14, 2026

Authentication bypass in Wavelens GmbH Gradient 1.1.0 allows remote attackers to join as workers and poison its Nix cache. The perform_auth() path accepts an unregistered worker UUID when no registration rows exist, then NarPush and NarUploaded write attacker-controlled bytes and metadata without verifying job ownership. The default discoverable mode exposes /proto; an admitted worker can access cross-organization jobs and repository SSH keys and corrupt cache content served to downstream Nix clients.

CVSS severity9.4
Critical
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Wavelens GmbH Gradient 1.1.0 allows remote attackers to join as workers and poison its Nix cache. The perform_auth() path accepts an unregistered worker UUID when no registration rows exist, then NarPush and NarUploaded write attacker-controlled bytes and metadata without verifying job ownership. The default discoverable mode exposes /proto; an admitted worker can access cross-organization jobs and repository SSH keys and corrupt cache content served to downstream Nix clients.

The record

CVE
CVE-2026-44592
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Wavelens GmbH
Product
Gradient
Classifications
CWE-306, CWE-345, CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 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=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wavelens GmbH · Gradientversion=1.1.0

Published CVSS scores

9.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-345Insufficient Verification of Data Authenticity
CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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