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MEDIUM

CVE-2026-3118

Rhdh: graphql injection leading to platform-wide denial of service (dos) in rh developer hub orchestrator plugin

CVSS v3

6.5

MEDIUM

EPSS Score

0.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-3118 Red Hat Product Security2 products fixed

    rhdh: GraphQL Injection Leading to Platform-Wide Denial of Service (DoS) in RH Developer Hub Orchestrator Plugin

  • RHSA-2026:13826 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Developer Hub 1.9.4 release.

  • RHSA-2026:9742 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Developer Hub 1.8.6 release.

Full record on NVD

Description

A security flaw was identified in the Orchestrator Plugin of Red Hat Developer Hub (Backstage). The issue occurs due to insufficient input validation in GraphQL query handling. An authenticated user can inject specially crafted input into API requests, which disrupts backend query processing. This results in the entire Backstage application crashing and restarting, leading to a platform-wide Denial of Service (DoS). As a result, legitimate users temporarily lose access to the platform.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2026-02-25
Last Modified
2026-05-05

Frequently asked questions

What is CVE-2026-3118?

A security flaw was identified in the Orchestrator Plugin of Red Hat Developer Hub (Backstage). The issue occurs due to insufficient input validation in GraphQL query handling. An authenticated user can inject specially crafted input into API requests, which disrupts backend query processing. This results in the entire Backstage application crashing and restarting, leading to a platform-wide Denial of Service (DoS). As a result, legitimate users temporarily lose access to the platform.

Is CVE-2026-3118 actively exploited?

Active exploitation of CVE-2026-3118 has not been confirmed. Its EPSS score was 0.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-3118?

CVE-2026-3118 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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