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TI-2026-39383 Aliases CVE-2026-54544

Fireshare has unauthenticated SSRF via missing login_required on webhook test endpoints

Priority HIGH 71CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Fireshare facilitates self-hosted media and link sharing. Prior to version 1.6.16, two API endpoints that trigger outbound HTTP requests are missing the @login_required decorator. An unauthenticated attacker can call POST /api/test-discord-webhook or POST /api/test-webhook and cause the Fireshare server to issue an arbitrary HTTP POST to any URL the attacker supplies, including internal network addresses and cloud metadata services. No credentials, session cookies, or prior access are required. Version 1.6.16 contains a patch.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00412 35th percentileScored 2026-11-07
Fix Fixed fireshare (ShaneIsrael): 1.6.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ShaneIsraelfiresharebefore 1.6.161.6.16Patch availableCNA
  • fireshare VendorShaneIsrael Affected before 1.6.16 Fixed in 1.6.16 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:shaneisrael:fireshare:*:*:*:*:*:*:*:*——ShaneIsrael
  • cpe:2.3:a:shaneisrael:fireshare:*:*:*:*:*:*:*:* Versions — — ·ShaneIsrael

Remediation

  • Fix · CNA fireshare (ShaneIsrael) Fixed in 1.6.16

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54544

References

Other 2

  • TI-2026-26989 Unauthenticated Path Traversal Arbitrary File Write in /api/uploadChunked/public CVSS 3.1CRITICAL 9.1
  • TI-2026-26026 Fireshare has Path Traversal Arbitrary File Write in `/api/uploadChunked` CVSS 3.1HIGH 8.1
  • TI-2025-35020 FireShare FileShare 1.2.25 contains a time-based blind SQL injection vulnerability in the… CVSS 3.1MEDIUM 6.5
  • TI-2026-39231 Fireshare has Unauthenticated Argument Injection to Arbitrary File Write/Overwrite CVSS 3.1CRITICAL 9.8
  • TI-2025-41424 Fireshare Public Uploads feature is vulnerable to OS Command Injection (RCE) CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences