Path Traversal Vulnerability in Blossom by Blossom
CVE-2026-2623

5.3MEDIUM

Key Information:

Vendor

Blossom

Status
Blossom
Vendor
CVE Published:
17 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2623?

A vulnerability has been identified in Blossom versions up to 1.17.1, specifically affecting the file upload functionality in the BLOSManager.java component. This issue allows an attacker to manipulate input in a way that can lead to unauthorized access to files through path traversal techniques. The exploitation can occur remotely, posing significant risks to data integrity and system security. Despite early communication attempts regarding this vulnerability, the vendor has not responded, heightening concerns over potential exploitation given that the exploit has already been made public.

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Affected Version(s)

Blossom 1.17.0

Blossom 1.17.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-2623 - Proof of Concept

References

https://vuldb.com/?id.346274
vdb-entrytechnical-description
https://vuldb.com/?ctiid.346274
signaturepermissions-required
https://vuldb.com/?submit.751988
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

xcxr (VulDB User)
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