CVE-2026-44937Network attack vector

Unauthenticated service disruption via unescaped webhook regex

Published Jul 6, 2026 · Updated Jul 6, 2026

Webhook request forgery in SUSE Rancher Fleet allows remote attackers to trigger repository processing without a shared secret. The webhook matcher treats repository URL hostnames and paths from requests as regular-expression fragments instead of quoting them before matching GitRepo entries. Exposure requires a webhook endpoint configured without a secret; forged matches can force continuous re-cloning and management-cluster resource depletion, or downgrade services when the attacker can read the target repository and knows its path.

CVSS severity8.3
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Webhook request forgery in SUSE Rancher Fleet allows remote attackers to trigger repository processing without a shared secret. The webhook matcher treats repository URL hostnames and paths from requests as regular-expression fragments instead of quoting them before matching GitRepo entries. Exposure requires a webhook endpoint configured without a secret; forged matches can force continuous re-cloning and management-cluster resource depletion, or downgrade services when the attacker can read the target repository and knows its path.

The record

CVE
CVE-2026-44937
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
NeuVector
Product
Rancher
Classifications
CWE-918, CAPEC-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 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=0.12.0 <0.12.15
  2. Affected versionversion=0.13.0 <0.13.11
  3. Affected versionversion=0.14.0 <0.14.6
  4. Affected versionversion=0.15.0 <0.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NeuVector · Rancherversion=0.12.0 <0.12.15; version=0.13.0 <0.13.11; version=0.14.0 <0.14.6; version=0.15.0 <0.15.2

Published CVSS scores

8.2NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.5GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H
8.3SUSECVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/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.

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

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-918Server-Side Request Forgery (SSRF)
CAPEC-122Privilege Abuse
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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