CVE-2026-108555

MEDIUM 4.2

PairDrop through 1.11.2 IP Spoofing via cf-connecting-ip Header

CVSS Score

4.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-348
Vendor	schlagmichdoch
Product	pairdrop
Published	Oct 10, 2026

Stay Ahead of the Next One

Get instant alerts for schlagmichdoch pairdrop

Be the first to know when new medium vulnerabilities affecting schlagmichdoch pairdrop are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

schlagmichdoch / PairDrop

0 ≤ 1.11.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/schlagmichdoch/PairDrop/issues/510 github.com: https://github.com/schlagmichdoch/PairDrop github.com: https://github.com/schlagmichdoch/PairDrop/blob/4862ba3067be1a0f2e0d1e94861dc9200b5bfeea/server/peer.js#L44-L54 github.com: https://github.com/schlagmichdoch/PairDrop/blob/4862ba3067be1a0f2e0d1e94861dc9200b5bfeea/server/ws-server.js#L312-L314 vulncheck.com: https://www.vulncheck.com/advisories/pairdrop-through-1.11.2-ip-spoofing-via-cf-connecting-ip-header

Credits

George Chen