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Vulnerabilities

Vulnerability · CVE-2026-33645

Fireshare facilitates self-hosted media and link sharing.

Published Mar 26, 2026 · catalog updated Jun 17, 2026 · Fireshare facilitates self-hosted media

Check if you run it

No confirmed exploitation is on record for CVE-2026-33645. EPSS is 0.54%. Act only if a listed version of Fireshare facilitates self-hosted media is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Fireshare facilitates self-hosted media).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.54%
Remediation
Advisory link
Affected products
cpe shaneisrael/fireshare

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 directory. The multipart field is used directly in filesystem path construction without sanitization or containment checks. This enables unauthorized file writes to attacker-chosen paths writable by the Fireshare process (e.g., container ), violating integrity and potentially enabling follow-on attacks depending on deployment. Version 1.5.2 fixes the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe shaneisrael/fireshare1.5.1

How to fix CVE-2026-33645

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33645. EPSS is 0.54%. Act only if a listed version of Fireshare facilitates self-hosted media is installed.

Which versions are affected?

Compare what you have installed with 1.5.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal; CWE-73. EPSS 0.54%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    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 directory. The multipart field is used directly in filesystem path construction without sanitization or containment checks. This enables unauthorized file writes to at

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 directory. The multipart field is used directly in filesystem path construction without sanitization or containment checks. This enables unauthorized file writes to at

Sources

  • CVE.orgVulnerability recordCVE-2026-33645

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33645

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-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 directory. The multipart field is us

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.