Security readout for executives and security teams
Plain-English summary
CVE-2026-3118 lets an authenticated user crash Red Hat Developer Hub’s Backstage application through malformed GraphQL input in the Orchestrator Plugin. The business impact is availability: legitimate users may temporarily lose access while the platform crashes and restarts.
Executive priority
Treat as a moderate-priority availability issue. It is not reported as data theft or code execution, but a single authenticated user could disrupt a developer platform. Prioritize remediation for shared or business-critical Developer Hub environments.
Technical view
The flaw is insufficient input validation in GraphQL query handling within the Red Hat Developer Hub Orchestrator Plugin. With low privileges and network access, an authenticated user can disrupt backend query processing, causing platform-wide denial of service. CVSS 3.1 score is 6.5, driven by high availability impact.
Likely exposure
Exposure is limited to environments running affected Red Hat Developer Hub 1.8, specifically rhdh/rhdh-hub-rhel9 identified by the listed affected image digest. Authentication is required, reducing internet-scale risk but not insider or compromised-account risk.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation. Exploitation requires an authenticated user and crafted API input; no user interaction is required. DoS affects the entire Backstage application, not just one plugin function.
Researcher notes
CWE is listed as CWE-89, but the described impact is GraphQL injection causing backend query disruption and DoS. Evidence provided identifies one affected Red Hat Developer Hub 1.8 image digest. Public exploit status is not established in the provided sources.
Mitigation direction
- Review Red Hat advisory RHSA-2026:9742 for the vendor-approved remediation.
- Prioritize updating affected Red Hat Developer Hub 1.8 deployments per Red Hat guidance.
- Restrict access to Developer Hub to trusted authenticated users where possible.
- Monitor Developer Hub restarts, crashes, and GraphQL error spikes.
Validation and detection
- Inventory Red Hat Developer Hub deployments and confirm version 1.8 usage.
- Check deployed rhdh/rhdh-hub-rhel9 image digest against the affected digest.
- Review Orchestrator Plugin usage and exposure to authenticated users.
- Confirm Red Hat advisory remediation has been applied where applicable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-3118 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:9742CVE reference · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-3118CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2442273CVE reference · issue-tracking, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.