How severe is CVE-2024-36858?

CVE-2024-36858 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-36858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-36858?

CVE-2024-36858 affects Homebrew Jan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-36858?

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

Does CVE-2024-36858 have an EU (EUVD) identifier?

Yes. CVE-2024-36858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2143.

When was CVE-2024-36858 published?

CVE-2024-36858 was published on 2024-06-04 and last updated on 2026-06-17.

CVE-2024-36858

CVE-2024-36858 is a critical-severity vulnerability in Homebrew Jan with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2143
Weakness: CWE-434
Affected product: Homebrew Jan
Published: 2024-06-04
Last modified: 2026-06-17

Description

An arbitrary file upload vulnerability in the /v1/app/writeFileSync interface of Jan v0.4.12 allows attackers to execute arbitrary code via uploading a crafted file.

Frequently asked questions

What is CVE-2024-36858?: An arbitrary file upload vulnerability in the /v1/app/writeFileSync interface of Jan v0.4.12 allows attackers to execute arbitrary code via uploading a crafted file.
How severe is CVE-2024-36858?: CVE-2024-36858 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-36858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-36858?: CVE-2024-36858 affects Homebrew Jan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-36858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-36858 have an EU (EUVD) identifier?: Yes. CVE-2024-36858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2143.
When was CVE-2024-36858 published?: CVE-2024-36858 was published on 2024-06-04 and last updated on 2026-06-17.

References

https://github.com/HackAllSec/CVEs/tree/main/Jan%20Arbitrary%20File%20Upload%20vulnerability

Affected products (1)

cpe:2.3:a:homebrew:jan:0.4.12:*:*:*:*:*:*:*

More vulnerabilities in Homebrew Jan

CVE-2024-37273 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in the /v1/app/appendFileSync interface of Jan v0.4.12 allows attackers to…
CVE-2024-36857 — High (CVSS 7.5): Jan v0.4.12 was discovered to contain an arbitrary file read vulnerability via the /v1/app/readFileSync interface.

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