CVE-2026-93539Network attack vectorHinoki check available

Cross-namespace GitRepo polling changes via unverified webhooks

Published Sep 28, 2026 · Updated Sep 28, 2026

Improper authorization in SUSE Rancher Fleet 0.16.0 through 0.16.1 allows remote attackers to change GitRepo polling through webhook requests. The gitjob receiver patches an unset GitRepo spec.pollingInterval to one hour before verifying the request against a webhook secret, including for a GitRepo in another namespace. Exploitation requires network access to the receiver and no configured webhook secret; it can delay legitimate Git rollouts but does not change deployed content or disclose data.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authorization in SUSE Rancher Fleet 0.16.0 through 0.16.1 allows remote attackers to change GitRepo polling through webhook requests. The gitjob receiver patches an unset GitRepo spec.pollingInterval to one hour before verifying the request against a webhook secret, including for a GitRepo in another namespace. Exploitation requires network access to the receiver and no configured webhook secret; it can delay legitimate Git rollouts but does not change deployed content or disclose data.

The record

CVE
CVE-2026-93539
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
SUSE
Product
Rancher
Classifications
CWE-862, CWE-306, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 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=0.16.0 <0.16.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SUSE · Rancherversion=0.16.0 <0.16.2

Published CVSS scores

6.3GitHub Security Advisory for rancher/fleetCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-306Missing Authentication for Critical Function
T1565.001Stored Data Manipulation

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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