CVE-2026-108555 Details
Description
PairDrop through 1.11.2 contains an IP spoofing vulnerability in Peer._setIP that allows remote attackers to join other networks' discovery rooms by supplying a forged cf-connecting-ip header. Attackers who know a victim's public IP can appear as a local device on self-hosted instances not behind Cloudflare to send or receive files.
An IP spoofing vulnerability has been identified in PairDrop versions through 1.11.2. The issue resides in the Peer._setIP function, where the 'cf-connecting-ip' header is trusted unconditionally. This allows remote attackers to join discovery rooms of other networks by supplying a forged IP header. Attackers aware of a victim's public IP can masquerade as a local device on self-hosted PairDrop instances not protected by Cloudflare, enabling them to send or receive files.
A pull request is available that modifies the IP handling to only trust 'cf-connecting-ip' when behind Cloudflare, which can be enabled with an opt-in option.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 10, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-348 | Use of Less Trusted Source | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| PairDrop | <= 1.11.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 10, 2026 | New CVE Received | [email protected] |