How severe is CVE-2026-36723?

CVE-2026-36723 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-36723 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-36723?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-36723 have an EU (EUVD) identifier?

Yes. CVE-2026-36723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35925.

When was CVE-2026-36723 published?

CVE-2026-36723 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-36723

CVE-2026-36723 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35925
Weakness: CWE-22
Published: 2026-06-09
Last modified: 2026-06-17

Description

An unrestricted file rename vulnerability in the /api/create-user component of bookcars v8.3 allows authenticated attackers to leverage directory traversal sequences to move arbitrary files from temporary storage to arbitrary locations on the server filesystem. This enables unauthorized access to sensitive files, the overwriting of critical application files, and remote code execution (RCE).

Frequently asked questions

What is CVE-2026-36723?: An unrestricted file rename vulnerability in the /api/create-user component of bookcars v8.3 allows authenticated attackers to leverage directory traversal sequences to move arbitrary files from temporary storage to arbitrary locations on the server filesystem. This enables unauthorized access to sensitive files, the overwriting of critical application files, and remote code execution (RCE).
How severe is CVE-2026-36723?: CVE-2026-36723 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-36723 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-36723?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-36723 have an EU (EUVD) identifier?: Yes. CVE-2026-36723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35925.
When was CVE-2026-36723 published?: CVE-2026-36723 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://github.com/CC-T-454455/Vulnerabilities/tree/master/bookcars/vulnerability-17

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