Red Hat Hardened Images Grafana Updates Fix Path-Decoding Bypass
Tech GuruQuick Answer
Red Hat published RHSA-2026:84422, RHSA-2026:84423, and RHSA-2026:84431 for CVE-2026-109955 in Hardened Images Grafana 12.4, 13.1, and 13.2. Match each image to its branch, rebuild or redeploy with the advisory-specific fixed RPM, test protected static-file access and authentication, monitor behavior, and retain evidence.
Confirm Scope And Apply The Supported Fix
What to do now: Inventory Hardened Images and derivatives containing Grafana 12.4, 13.1, or 13.2, match each artifact to the exact Red Hat advisory and architecture, preserve build evidence, consume the corresponding fixed RPM, rebuild and redeploy, validate access controls, and document exceptions.
Last verified: 2026-10-18 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Red Hat Hardened Images Grafana 12.4, 13.1, and 13.2 RPM families |
|---|---|
| Advisory | RHSA-2026:84422 / RHSA-2026:84423 / RHSA-2026:84431 |
| CVE | CVE-2026-109955 |
| Authoritative release date | 2026-10-17 18:08:49 UTC |
| Authority revision date | 2026-10-17 20:48:16 UTC |
| Affected versions | Red Hat Hardened Images matched to RHSA-2026:84422, RHSA-2026:84423, or RHSA-2026:84431 that do not contain the advisory-specific fixed Grafana RPM; the CSAF documents list fixed packages rather than general affected-version ranges. |
| Fixed version | grafana12.4 12.4.12-0.5.hum1, grafana13.1 13.1.7-0.2.hum1, or grafana13.2 13.2.3-0.2.hum1, matched to the deployed advisory branch |
| CVSS base score | 5.3 (CVSS v3.1) |
| CVSS severity | Medium |
| Exploitation status | Not stated by Red Hat; no exploitation claim is inferred. |
What Changed
Red Hat published three branch-specific Hardened Images updates for a Hono double-path-decoding flaw in the Grafana static-file path. A remote unauthenticated attacker can use specially encoded paths to bypass security middleware and access protected static files. The CSAF documents do not state that exploitation has occurred and mark no restart as required.
What To Validate Now
- Inventory. Locate Red Hat Hardened Images and derivatives containing Grafana 12.4, 13.1, or 13.2, then record image digests, build provenance, architecture, installed Grafana RPM, deployment role, exposure, owner, and recovery dependencies.
- Establish applicability. Match each image to RHSA-2026:84422, RHSA-2026:84423, or RHSA-2026:84431 and its exact Grafana branch. Do not apply one branch's fixed package statement to another release line.
- Remediate. Use the supported Red Hat Hardened Images channel to consume grafana12.4 12.4.12-0.5.hum1, grafana13.1 13.1.7-0.2.hum1, or grafana13.2 13.2.3-0.2.hum1 as appropriate, then rebuild and redeploy derived images.
- Validate. Confirm the deployed Grafana RPM and image digest, test authenticated and unauthenticated static-file requests including encoded paths, verify middleware and proxy behavior, review access and application logs, and verify rollback readiness.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
The three advisories share one CVE but cover separate Grafana branches. Match exact RPMs and architecture, invalidate stale build caches, coordinate application and proxy testing, and do not infer exploitation from the reachable network path or CVSS score.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
