What is CVE-2026-33645?

CVE-2026-33645 is a high-severity vulnerability in Shaneisrael Fireshare, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-03-26.

How severe is CVE-2026-33645?

High severity. CVSS v3 base score is 7.1 out of 10.

Path Traversal in Shaneisrael Fireshare

CVE-2026-33645

Fireshare facilitates self-hosted media and link sharing. In version 1.5.1, an authenticated path traversal vulnerability in Fireshare’s chunked upload endpoint allows an attacker to write arbitrary files outside the intended upload direct…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L.

Affected products

Shaneisrael Fireshare — versions = 1.5.2

Weakness classification (CWE)

References

https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-7q8r-vpq3-89m7 (x_refsource_CONFIRM)
https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.2 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33645?: CVE-2026-33645 is a high-severity vulnerability in Shaneisrael Fireshare, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-03-26.
How severe is CVE-2026-33645?: High severity. CVSS v3 base score is 7.1 out of 10.