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CVE-2026-108555— PairDrop through 1.11.2 IP Spoofing via cf-connecting-ip Header

Quick assessment

Affected
schlagmichdoch PairDrop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PairDrop 在版本 1.11.2 及之前存在 IP 欺骗漏洞，位于 Peer._setIP 函数中。远程攻击者可通过提供伪造的 cf-connecting-ip 头，加入其他网络的发现房间。如果攻击者知晓受害者的公网 IP，他们可以伪装成自托管实例（未通过 Cloudflare 服务）上的本地设备，从而发送或接收文件。

CVSS 4.2 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
schlagmichdoch PairDrop ≤ 1.11.2 affected
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I. Basic Information for CVE-2026-108555

Vulnerability Information
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Vulnerability Title
PairDrop through 1.11.2 IP Spoofing via cf-connecting-ip Header
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
schlagmichdoch PairDrop 0 ~ 1.11.2 -

II. Public POCs for CVE-2026-108555

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III. Intelligence Information for CVE-2026-108555

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Patches & Fixes for CVE-2026-108555 (2)

Vendor Advisories for CVE-2026-108555 (1)

Other References for CVE-2026-108555 (1)

IV. Related Vulnerabilities

Same weakness: CWE-348

V. Comments for CVE-2026-108555

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