Summary
Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.
Security Fix(es):
* grafana: Grafana: Privilege escalation via dashboard overwrite (CVE-2026-33377)
* grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6 allow-list default (CVE-2026-33376)
* grafana: Grafana: Denial of Service via unbounded memory growth in OAuth login route (CVE-2026-8609)
* grafana: Grafana: Denial of Service via excessive memory allocation from large API request payloads (CVE-2026-33382)
* encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)
* net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)
* html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)
* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)
* encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)
* grafana: PLUGIN ARCHIVE EXTRACTION ESCAPES THE PLUGIN DIRECTORY, ALLOWING CODE EXECUTION (CVE-2026-15815)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 16
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 10 | grafana | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debuginfo | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debuginfo | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debuginfo | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debuginfo | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debugsource | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debugsource | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debugsource | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-debugsource | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-selinux | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-selinux | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-selinux | 0:12.4.3-3.el10_3.2 |
| Rocky Linux · 10 | grafana-selinux | 0:12.4.3-3.el10_3.2 |
Vulnerabilities 11
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High 8.8
CVE-2026-15815 CVE Record
Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when extracting plugin archives. A crafted plugin archive can chain relative symbolic link entries to escape the plugin installation directory, writing arbitrary files and an executable …
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High 7.5
Denial of service via unbounded request body size
Several Grafana API endpoints, some of them unauthenticated, do not limit the size of the request body before processing it. An attacker can send very large payloads that force excessive memory allocation, potentially exhausting memory and causing a denial of…
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High 7.5
Enforce maximum recursion depth in encoding/asn1
Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures.
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High 7.5
Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http
When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.
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High 7.5
Add recursion depth guard during decode in encoding/xml
Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.
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High 7.5
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key deriva…
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High 7.4
Auth Proxy IPv6 whitelist bypass
When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML,…
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High 7.1
Dashboard Import Overwrites ACL — Editor Privilege Escalation to Dashboard Admin
An Editor can overwrite a dashboard not owned by them to acquire admin on that specific dashboard. The user must have write access to the dashboard to escalate privilege.
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Medium 6.1
Fix Javascript regexp context tracking in html/template
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
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Medium 5.9
Avoid quadratic complexity in resolvePath in net/url
Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte…
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Medium 5.3
Pre-authentication denial of service via the OAuth login route
An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).
References
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2477246
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2477262
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2527474
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515820
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515840
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515838
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2499061
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515827
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515815
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2515839
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2499062
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advisory
https://access.redhat.com/errata/RHSA-2026:98056