CVE-2026-34745: ShaneIsrael fireshare · Path Traversal
Affects ShaneIsrael fireshareSource CVE Database V5
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
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:HExploitation evidence
Disclosed: evidence found.
CVE published 2 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| ShaneIsraelfireshare | Affected
| Fixed in
|
GitHubshaneisrael/firesharepkg:github/shaneisrael/fireshareOther threats | Affected
| Fixed in
|
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
- github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc (opens in a new tab)
- github.com/ShaneIsrael/fireshare/pull/520 (opens in a new tab)
- github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24 (opens in a new tab)
- github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3 (opens in a new tab)