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VulnerabilityPublished

CVE-2026-34745: ShaneIsrael fireshare · Path Traversal

Affects ShaneIsrael fireshareSource CVE Database V5

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Mentioned vulnerabilities

Not known to be exploited · CVSS 9.1 Critical : upgrade to 1.5.3 as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

Contested

Critical score, yet low EPSS after six months
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade fireshare and shaneisrael/fireshare to 1.5.3.

Affected software

ProductAffectedFixed in
ShaneIsraelfireshareAffected
  • <1.5.3
Fixed in
  • 1.5.3
GitHubshaneisrael/firesharepkg:github/shaneisrael/fireshareOther threatsAffected
  • <1.5.3
Fixed in
  • 1.5.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade fireshare to version 1.5.3 or later, where this vulnerability has been patched. No other mitigations are indicated by the vendor advisory. Patch status is confirmed by the vendor's versioning information.

Description

CVE-2026-34745 is a critical path traversal vulnerability in ShaneIsrael fireshare versions prior to 1.5.3. The issue exists because a fix applied to the authenticated /api/uploadChunked endpoint was not applied to the unauthenticated /api/uploadChunked/public endpoint. This allows an unauthenticated attacker to exploit the checkSum parameter to write arbitrary files with attacker-controlled content to any writable path on the server filesystem. The vulnerability has been patched in version 1.5.3.

References

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