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NVD / CVE Program· CNA suse

CVE-2026-44937: SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components

Noroxi assessment

Priority: Monitor (action score 33/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: SUSE Rancher 0.12.15, 0.13.11, 0.14.6.

Low priority for now. Upgrade to SUSE Rancher 0.12.15, 0.13.11, 0.14.6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Potential forgery of webhook requests when using a unauthenticated webhook in SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.5 could be used by remote attackers to cause a denial of service or a downgrade attack on other repositories on the system.

HighCVSS 8.3 · v4.0—No exploit Fix available
Published
Jul 6, 2026
Updated
Oct 25, 2026
EPSS
0.4% · 36th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · suse
8.3
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-44937

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
suserancher fleet

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • suse rancher fleet0.12.0 and later · before 0.12.15
  • suse rancher fleet0.13.0 and later · before 0.13.11
  • suse rancher fleet0.14.0 and later · before 0.14.6
  • suse rancher fleet0.15.0 and later · before 0.15.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (suse). Independent of NVD's CPE analysis and usually ahead of it.

  • SUSE Rancher

    • 0.15.0 and later · before 0.15.2affected · semver
    • 0.14.0 and later · before 0.14.6affected · semver
    • 0.13.0 and later · before 0.13.11affected · semver
    • 0.12.0 and later · before 0.12.15affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/rancher/fleetfrom 0.12.0 · before 0.12.150.12.15
Gogithub.com/rancher/fleetfrom 0.13.0 · before 0.13.110.13.11
Gogithub.com/rancher/fleetfrom 0.14.0 · before 0.14.60.14.6
Gogithub.com/rancher/fleetfrom 0.15.0 · before 0.15.20.15.2

Same product

suse: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-44935Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer
    39Monitor
  • CVE-2026-41050Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
    39Monitor
  • CVE-2026-88808Fleet agent copies downstream resources with cluster-admin privileges, allowing cross-namespace writes on downstream clusters
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-44948Jun 30, 2026 · Path Traversal in Rancher Fleet ImageScan GitRepo Path Handler
    21Monitor
  • ← EarlierCVE-2026-44936Jul 6, 2026 · Rancher Fleet SSRF in Bundle Reader via Unvalidated Helm Repository URL in fleet.yaml
    20Monitor
  • Later →CVE-2026-44938Jul 7, 2026 · Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
SUSE Rancher0.12.15Vendor (CNA)
SUSE Rancher0.13.11Vendor (CNA)
SUSE Rancher0.14.6Vendor (CNA)
SUSE Rancher0.15.2Vendor (CNA)
Go:github.com/rancher/fleet0.12.15Package registry (OSV)
Go:github.com/rancher/fleet0.13.11Package registry (OSV)
Go:github.com/rancher/fleet0.14.6Package registry (OSV)
Go:github.com/rancher/fleet0.15.2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-7503659 days apartFleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing
    21Monitor
  • CVE-2026-449360 days apartRancher Fleet SSRF in Bundle Reader via Unvalidated Helm Repository URL in fleet.yaml
    20Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-918 · Server-Side Request Forgery (SSRF)

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records