CVE-2026-8609 (GCVE-0-2026-8609)

Vulnerability from cvelistv5 – Published: 2026-07-10 14:58 – Updated: 2026-07-10 15:53
VLAI
Title
Pre-authentication denial of service via the OAuth login route
Summary
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).
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Grafana Grafana OSS Affected: 11.6.0 , ≤ 11.6.14 (semver)
Affected: 12.2.0 , ≤ 12.2.8 (semver)
Affected: 12.3.0 , ≤ 12.3.6 (semver)
Affected: 12.4.0 , ≤ 12.4.3 (semver)
Affected: 13.0.0 , ≤ 13.0.1 (semver)
Create a notification for this product.
Date Public
2026-06-09 00:00
Credits
cyberjoker (Researcher)
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.