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VulnerabilityPublished Updated

CVE-2026-33376: Grafana OSS · Insecure Default

Affects Grafana OSSSource CVE Database V5

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Not known to be exploited · CVSS 7.4 High · fixed in 13.0.1+security-01 : patch Grafana OSS soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 13.0.1+security-01, 12.4.3+security-02, 12.3.6+security-04 +2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
GrafanaGrafana OSSAffected
  • >=9.4.0 <=11.6.14
  • >=11.6.14 <11.6.14+security-04
  • >=12.0.0 <=12.2.8
  • >=12.2.8 <12.2.8+security-04
  • >=12.3.0 <=12.3.6
  • >=12.3.6 <12.3.6+security-04
  • >=12.4.0 <=12.4.3
  • >=12.4.3 <12.4.3+security-02
  • >=13.0.0 <=13.0.1
  • >=13.0.1 <13.0.1+security-01
Fixed in
  • 13.0.1+security-01
  • 12.4.3+security-02
  • 12.3.6+security-04
  • 12.2.8+security-04
  • 11.6.14+security-04

AI-suggested

To mitigate this vulnerability, users should explicitly specify the desired IPv6 mask (typically /128) in the allow-list entries for the Auth Proxy feature. Monitor vendor advisories for any future official fixes.

Description

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, LDAP, etc are unaffected here.

References

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