CVE-2026-108555
PairDrop through 1.11.2 IP Spoofing via cf-connecting-ip Header
- State
- Published
- Severity
- 2.3 Low
- Published
- Oct 10, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.2 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-348 Use of Less Trusted Source
Affected Products
| Product | Versions |
|---|---|
PairDropschlagmichdoch |
|
References
- GitHub Issue #510issue-tracking
- https://github.com/schlagmichdoch/PairDropproduct
- https://github.com/schlagmichdoch/PairDrop/blob/4862ba3067be1a0f2e0d1e94861dc9200b5bfeea/server/peer.js#L44-L54technical-description
- https://github.com/schlagmichdoch/PairDrop/blob/4862ba3067be1a0f2e0d1e94861dc9200b5bfeea/server/ws-server.js#L312-L314technical-description
- VulnCheck Advisory: PairDrop through 1.11.2 IP Spoofing via cf-connecting-ip Headerthird-party-advisory
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