# CVE-2026-63308: Helm Files.Lines Denial of Service via Empty Chart Files

CVE-2026-63308 is fixed in helm on 1 platform, first by SUSE-SU-2026:3882-1, released August 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-63308
- Priority: Routine
- CVSS: 4.3 (Moderate)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 23, 2026
- Weakness: Improper Validation of Array Index
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63308

## Description

This update for helm fixes the following issues:  	 - CVE-2026-41178: `go.opentelemetry.io/otel/baggage`,`go.opentelemetry.io/otel/propagation`: no rejection of raw-length   headers in baggage parsing allows for DoS via oversized inputs (bsc#1276510). - CVE-2026-63308: processing zero-length byte slices in template chart files can trigger an index out-of-range panic   (bsc#1272402). - gRPC-Go: several issues affecting the xDS RBAC authorization engine and the HTTP/2 transport server implementation   (bsc#1276514).  Changes for helm:  - Bump vendor to address various security issues:   * golang.org/x/mod@v0.40.0   * oras.land/oras-go/v2@v2.6.2   * google.golang.org/grpc@v1.82.1   * go.opentelemetry.io/otel@v1.44.0

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | helm opensuse-leap 16.0 | 3.21.3-160000.2.1 | [OPENSUSE-SU-2026:21809-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21809-1.md) | Sep 8, 2026 |
| Linux | helm sles 15.6 | 3.21.3-150000.1.93.1 | [SUSE-SU-2026:3882-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3882-1.md) | Aug 31, 2026 |
| Linux | helm sles 15.7 | 3.21.3-150000.1.93.1 | [SUSE-SU-2026:3882-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3882-1.md) | Aug 31, 2026 |
| Linux | helm sles 16.0 | 3.21.3-160000.2.1 | [SUSE-SU-2026:23688-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23688-1.md) | Sep 8, 2026 |

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Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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