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TI-2026-23767 Aliases CVE-2026-30942

Flare has a Path Traversal in /api/avatars/[filename]

Priority HIGH 69CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to 1.7.3, an authenticated path traversal vulnerability in /api/avatars/[filename] allows any logged-in user to read arbitrary files from within the application container. The filename URL parameter is passed to path.join() without sanitization, and getFileStream() performs no path validation, enabling %2F-encoded ../ sequences to escape the uploads/avatars/ directory and read any file accessible to the nextjs process under /app/. Authentication is enforced by Next.js middleware. However, on instances with open registration enabled (the default), any attacker can self-register and immediately exploit this. This vulnerability is fixed in 1.7.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00692 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Flare (FlintSH): 1.7.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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
FlintSHFlarebefore 1.7.31.7.3Patch availableCNA
  • Flare VendorFlintSH Affected before 1.7.3 Fixed in 1.7.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:flintsh:flare:*:*:*:*:*:*:*:*before 1.7.3VulnerableFlintSH
  • cpe:2.3:a:flintsh:flare:*:*:*:*:*:*:*:* Versions before 1.7.3 Vulnerable ·FlintSH

Remediation

  • Fix · CNA Flare (FlintSH) Fixed in 1.7.3

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-30942
  2. 2026-10-27 EPSS moved to the 50th–90th percentile

References

Exploit 1

Patch 1

Other 1

  • TI-2026-23463 Flare: Password‑Protected Thumbnail Bypass CVSS 4.0HIGH 8.2
  • TI-2026-23464 Flare: Private File IDOR via raw/direct endpoints CVSS 4.0MEDIUM 6.0
  • TI-2026-21472 Flare has XSS vulnerability in Raw File Preview CVSS 3.1MEDIUM 5.4

Sources

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