[UPDATE] [high] Fleet: Multiple vulnerabilities

highCVE-2026-44935 CVE-2026-44936 CVE-2026-44937 CVE-2026-44938

An attacker can exploit multiple vulnerabilities in Fleet to bypass security mechanisms, disclose confidential information, cause a denial-of-service condition, or manipulate security configurations.

CSIRTS triage

vendor: Fleet product: Fleet Authentication bypass Information disclosure Denial of serviceOther

What: Multiple vulnerabilities allow an attacker to bypass security mechanisms, disclose confidential information, cause a denial-of-service condition, or manipulate security configurations.
Who is affected: Deployments of Fleet are affected.
Urgency: Remediation is urgent due to the high severity of the vulnerabilities.
Action: Update to the latest version of Fleet.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-07-08
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1715

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-449350.58% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all scored CVEs.
Low exploitation riskCVE-2026-449360.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
Low exploitation riskCVE-2026-449370.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.
Low exploitation riskCVE-2026-449380.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-44935	coverage & exploitation status	NVD · CVE.org
CVE-2026-44936	coverage & exploitation status	NVD · CVE.org
CVE-2026-44937	coverage & exploitation status	NVD · CVE.org
CVE-2026-44938	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Fleet

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-44938: A vulnerability has been identified in Fleet's agent-side deployer, which did not filter secur…nvd · 2026-07-07
highCVE-2026-44937: Potential forgery of webhook requests when using a unauthenticated webhook in SUSE Rancher Fle…nvd · 2026-07-06
mediumCVE-2026-44936: Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Ranc…nvd · 2026-07-06
criticalCVE-2026-44935: Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 befo…nvd · 2026-07-02
medium[NEW] [medium] Fleet: Vulnerability allows Denial of Servicecert-bund · 2026-07-02
mediumCVE-2026-56151: Improper Input Validation (CWE-20) in Kibana can lead to a denial of service via Input Data Ma…nvd · 2026-07-01