How severe is CVE-2023-26603?

CVE-2023-26603 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-26603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-26603?

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

Does CVE-2023-26603 have an EU (EUVD) identifier?

Yes. CVE-2023-26603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-30398.

When was CVE-2023-26603 published?

CVE-2023-26603 was published on 2024-04-26 and last updated on 2026-06-17.

CVE-2023-26603

CVE-2023-26603 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. 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-378.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-30398
Weakness: CWE-378
Published: 2024-04-26
Last modified: 2026-06-17

Description

JumpCloud Agent before 1.178.0 Creates a Temporary File in a Directory with Insecure Permissions. This allows privilege escalation to SYSTEM via a repair action in the installer.

Frequently asked questions

What is CVE-2023-26603?: JumpCloud Agent before 1.178.0 Creates a Temporary File in a Directory with Insecure Permissions. This allows privilege escalation to SYSTEM via a repair action in the installer.
How severe is CVE-2023-26603?: CVE-2023-26603 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-26603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-26603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-26603 have an EU (EUVD) identifier?: Yes. CVE-2023-26603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-30398.
When was CVE-2023-26603 published?: CVE-2023-26603 was published on 2024-04-26 and last updated on 2026-06-17.

References

Other CWE-378 vulnerabilities

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CVE-2021-29428 — High (CVSS 8.8): In Gradle before version 7.0, on Unix-like systems, the system temporary directory can be created with open permissions…
CVE-2026-33572 — High (CVSS 8.4): OpenClaw before 2026.2.17 creates session transcript JSONL files with overly broad default permissions, allowing local…
CVE-2026-4137 — High (CVSS 7.8): In mlflow/mlflow versions prior to 3.11.0, the `get_or_create_nfs_tmp_dir()` function in `mlflow/utils/file_utils.py`…

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