schlagmichdoch PairDrop up to 1.11.2 IP Handler Peer._setIP cf-connecting-ip improper authentication

Summaryinfo

A vulnerability, which was classified as critical, has been found in schlagmichdoch PairDrop up to 1.11.2. This vulnerability affects the function Peer._setIP of the component IP Handler. This manipulation of the argument cf-connecting-ip causes improper authentication. This vulnerability is handled as CVE-2026-108555. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in schlagmichdoch PairDrop up to 1.11.2. It has been declared as critical. Affected by this vulnerability is the function Peer._setIP of the component IP Handler. The manipulation of the argument cf-connecting-ip with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-108555 since 10/10/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• schlagmichdoch

Name

• PairDrop

Version

• 1.11.0
• 1.11.1
• 1.11.2

Website

• Product: https://github.com/schlagmichdoch/PairDrop/

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