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Fencer Vulns
medium 6.0

CVE-2026-79656 json

OAuth and OIDC tokens written unredacted to server logs by the Generic OAuth, Google and GitLab connectors

published 2026-10-28 11 d ago modified 2026-11-05 3 d ago also EUVD-2026-112280

cvss
6.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

A user with read access to Grafana's server logs, or to a log store they are shipped to, can recover the OAuth and OIDC access, refresh and ID tokens of users who sign in through the Generic OAuth, Google or GitLab providers. Grafana writes these tokens to its logs unredacted when an access or ID token is not a valid JWT, when the ID token is missing (at debug level) or is not a string (exposure of sensitive information in log files). The exposure is bounded by the scopes granted to the configured OAuth client.

Patch / fix

  • Grafana Grafana OSS 12.4.11, 13.0.9, 13.1.6, 13.2.2
  • Grafana Grafana Enterprise 12.4.11, 13.0.9, 13.1.6, 13.2.2
  • grafana openSUSE Tumbleweed 12.4.11-1.1

opensuse advisories openSUSE-SU-2026:11920-1

  • grafana Alpine 3.24 12.4.14-r0

alpine advisories ALPINE-CVE-2026-79656

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-79656 updated cvss 5.9

grafana: OAuth and OIDC tokens written unredacted to Grafana server logs

  • Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel9 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9 Red Hat Ceph Storage 7 rhceph/grafana-rhel9 Red Hat Ceph Storage 8 rhceph/grafana-rhel9 Red Hat Ceph Storage 9 rhceph/grafana-rhel10 Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    +2 more products
    Red Hat Enterprise Linux 9 grafana, rhel9/grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana, rhel10/grafana
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images grafana13.1 13.1.8-0.5.hum1, grafana13.2 13.2.4-0.4.hum1, grafana12.4 12.4.13-0.5.hum1
    fixed: vendor fix RHSA-2026:91292
  • Red Hat Hardened Images hi/grafana
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 d ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Affected products

  • Grafana Grafana OSS
  • Grafana Grafana Enterprise

Classification

Weakness
  • CWE-532 Insertion of Sensitive Information into Log File

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.