CVE-2026-17033

Aliases:CGA-2v29-q2f7-xp6wCGA-5j9g-2pgp-cpq4CGA-5rwr-5fxg-6jf3CGA-7w4x-7vf6-5j99CGA-jffq-83p4-g39jCGA-3f3j-4cg6-27cqCGA-cvc7-pww9-xp63CGA-fxrh-jg32-q6qrCGA-v435-x684-rhfpCGA-w3qw-572c-5p35CGA-wfr2-x63j-8w3pCGA-x635-77j9-gvc6
Advisory lineage Upstream: 0 Downstream: 1
Awaiting Analysis
Published: 24 Aug 2026, 13:52
Last modified:27 Aug 2026, 17:22

Vulnerability Summary

Overall Risk (default)
medium
27/100
CVSS Score
6.8 MEDIUM
v3.1 (cve.org)
EPSS Score
0.21% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

24 Aug 2026, 13:52
Published
Vulnerability first disclosed
27 Aug 2026, 17:22
Last Modified
Vulnerability information updated

Description

An authenticated attacker with Editor access or alert.instances.external:write can submit an external Alertmanager alert containing a controlled generatorURL. The attacker is authorized to create the alert, but not to execute script in another user's Grafana session. Grafana renders alert.generatorURL directly as the Alert Details See source LinkButton href without URL-scheme sanitization or a safe-protocol allowlist. The click interceptor's :// heuristic can be bypassed by placing :// inside a JavaScript comment. When a user with read access clicks See source, the browser executes attacker-controlled JavaScript in the Grafana origin with the clicking user's permissions.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.8CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

EPSS Trends

Current EPSS score: 0.21%• Percentile: 12%

Techniques & Countermeasures

  • CWE-79•Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

    The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected Systems

  • chainguard•grafana-11.6

    all

  • chainguard•grafana-12.1

    all

  • chainguard•grafana-12.2

    all

  • chainguard•grafana-12.3

    all

  • chainguard•grafana-12.4

    < 12.4.10-r0

  • chainguard•grafana-13.0

    all

  • wolfi•grafana-12.3

    all

  • wolfi•grafana-12.4

    < 12.4.10-r0

  • wolfi•grafana-13.0

    all

  • grafana•grafana oss

    ≤ 12.3.11 | ≥ 12.4.0, ≤ 12.4.9 | ≥ 13.0.0, ≤ 13.0.7

References (1)