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Fencer Vulns
high 7.7

CVE-2026-42129 json

Path traversal in the Loki data source plugin

published 2026-06-22 4 mo ago modified 2026-10-25 14 d ago also GHSA-f74p-cwhp-x2wx , GO-2026-6544 , EUVD-2026-38241

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.

Patch / fix

  • go github.com/grafana/grafana 1.9.2-0.20260616075434-82ef13993059
  • grafana Alpine 3.24 12.4.4-r0

alpine advisories ALPINE-CVE-2026-42129

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
GitHub 3.1 7.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/grafana/grafana
>=2.0.0-beta1
>=12.0.0
>=12.3.0
>=13.0.0
>=12.4.0
<1.9.2-0.20260616075434-82ef13993059
all versions
>=2.0.0-beta1+incompatible
1.9.2-0.20260616075434-82ef13993059

Affected products

  • Grafana Grafana OSS

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.