# RHSA-2026:67517: grafana security update

RHSA-2026:67517, released July 6, 2026, fixes 20 CVEs in grafana (version 10.2.6-26.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-67517
- Platform: Linux
- Released: Jul 6, 2026
- Priority: Urgent (Closes CVE-2026-39821, rated Critical)
- CVEs: 20, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:67517

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [grafana](https://patchblox.com/security/data/product/linux/grafana.md) | RHEL 10 | 10.2.6-26.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-39821](https://patchblox.com/security/data/cve/CVE-2026-39821.md) | Urgent | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna | 10.0 | 0.0183 |  |
| [CVE-2026-42499](https://patchblox.com/security/data/cve/CVE-2026-42499.md) | High | Quadratic string concatenation in consumePhrase in net/mail | 8.8 | 0.0080 |  |
| [CVE-2026-39820](https://patchblox.com/security/data/cve/CVE-2026-39820.md) | High | Quadratic string concatentation in consumeComment in net/mail | 8.8 | 0.0078 |  |
| [CVE-2026-27137](https://patchblox.com/security/data/cve/CVE-2026-27137.md) | High | Incorrect enforcement of email constraints in crypto/x509 | 9.1 | 0.0066 |  |
| [CVE-2026-33818](https://patchblox.com/security/data/cve/CVE-2026-33818.md) | High | Enforce maximum recursion depth in encoding/asn1 | 8.8 | 0.0057 |  |
| [CVE-2026-56853](https://patchblox.com/security/data/cve/CVE-2026-56853.md) | High | Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http | 8.8 | 0.0057 |  |
| [CVE-2026-56859](https://patchblox.com/security/data/cve/CVE-2026-56859.md) | High | Add recursion depth guard during decode in encoding/xml | 8.8 | 0.0057 |  |
| [CVE-2026-56862](https://patchblox.com/security/data/cve/CVE-2026-56862.md) | High | Limit handshake messages we are willing to accept post-handshake in crypto/tls | 8.8 | 0.0057 |  |
| [CVE-2026-42504](https://patchblox.com/security/data/cve/CVE-2026-42504.md) | High | Quadratic complexity in WordDecoder.DecodeHeader in mime | 8.8 | 0.0056 |  |
| [CVE-2026-56860](https://patchblox.com/security/data/cve/CVE-2026-56860.md) | High | Avoid quadratic complexity in resolvePath in net/url | 8.8 | 0.0055 |  |
| [CVE-2026-42127](https://patchblox.com/security/data/cve/CVE-2026-42127.md) | High | grafana: The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated atta... | 7.5 | 0.0043 |  |
| [CVE-2026-8609](https://patchblox.com/security/data/cve/CVE-2026-8609.md) | High | grafana: An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded mem... | 7.4 | 0.0040 |  |
| [CVE-2026-33382](https://patchblox.com/security/data/cve/CVE-2026-33382.md) | High | grafana: Several Grafana API endpoints, some of them unauthenticated, do not limit the size of the request body before process... | 7.4 | 0.0039 |  |
| [CVE-2026-33810](https://patchblox.com/security/data/cve/CVE-2026-33810.md) | High | Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509 | 9.1 | 0.0035 |  |
| [CVE-2026-56858](https://patchblox.com/security/data/cve/CVE-2026-56858.md) | High | Fix Javascript regexp context tracking in html/template | 8.8 | 0.0031 |  |
| [CVE-2026-33376](https://patchblox.com/security/data/cve/CVE-2026-33376.md) | High | grafana: When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses | 7.4 | 0.0028 |  |
| [CVE-2026-33377](https://patchblox.com/security/data/cve/CVE-2026-33377.md) | High | grafana: Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB | 7.5 | 0.0023 |  |
| [CVE-2026-25681](https://patchblox.com/security/data/cve/CVE-2026-25681.md) | High | Invoking  incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html | 8.7 | 0.0022 |  |
| [CVE-2026-27136](https://patchblox.com/security/data/cve/CVE-2026-27136.md) | High | Invoking  duplicate attributes can cause XSS in golang.org/x/net/html | 8.7 | 0.0022 |  |
| [CVE-2026-42502](https://patchblox.com/security/data/cve/CVE-2026-42502.md) | High | Invoking  incorrect handling of HTML elements in foreign content in golang.org/x/net/html | 8.2 | 0.0022 |  |

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Data as of 2026-11-08T19:12:23Z 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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