How severe is CVE-2026-3118?

CVE-2026-3118 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-3118 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3118?

CVE-2026-3118 affects Redhat Developer Hub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3118?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3118 have an EU (EUVD) identifier?

Yes. CVE-2026-3118 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8656.

When was CVE-2026-3118 published?

CVE-2026-3118 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-3118

CVE-2026-3118 is a medium-severity vulnerability in Redhat Developer Hub with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8656
Weakness: CWE-89
Affected product: Redhat Developer Hub
Published: 2026-02-25
Last modified: 2026-06-17

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.

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.
How severe is CVE-2026-3118?: CVE-2026-3118 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-3118 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3118?: CVE-2026-3118 affects Redhat Developer Hub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3118?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3118 have an EU (EUVD) identifier?: Yes. CVE-2026-3118 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8656.
When was CVE-2026-3118 published?: CVE-2026-3118 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:developer_hub:-:*:*:*:*:*:*:*

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