How severe is CVE-2026-5803?

CVE-2026-5803 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5803?

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

Does CVE-2026-5803 have an EU (EUVD) identifier?

Yes. CVE-2026-5803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20625.

When was CVE-2026-5803 published?

CVE-2026-5803 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-5803

CVE-2026-5803 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20625
Weakness: CWE-918
Published: 2026-04-08
Last modified: 2026-06-17

Description

A security flaw has been discovered in bigsk1 openai-realtime-ui up to 188ccde27fdf3d8fab8da81f3893468f53b2797c. The affected element is an unknown function of the file server.js of the component API Proxy Endpoint. Performing a manipulation of the argument Query results in server-side request forgery. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The patch is named 54f8f50f43af97c334a881af7b021e84b5b8310f. It is suggested to install a patch to address this issue.

Frequently asked questions

What is CVE-2026-5803?: A security flaw has been discovered in bigsk1 openai-realtime-ui up to 188ccde27fdf3d8fab8da81f3893468f53b2797c. The affected element is an unknown function of the file server.js of the component API Proxy Endpoint. Performing a manipulation of the argument Query results in server-side request forgery. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The patch is named 54f8f50f43af97c334a881af7b021e84b5b8310f. It is suggested to install a patch to address this issue.
How severe is CVE-2026-5803?: CVE-2026-5803 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-5803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5803 have an EU (EUVD) identifier?: Yes. CVE-2026-5803 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20625.
When was CVE-2026-5803 published?: CVE-2026-5803 was published on 2026-04-08 and last updated on 2026-06-17.

References

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

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