Deserialization Vulnerability in bolo-solo Affected by SnakeYAML Component
CVE-2026-1691

5.3MEDIUM

Key Information:

Vendor

Bolo Blog

Status
Bolo-solo
Vendor
CVE Published:
30 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1691?

A deserialization vulnerability has been identified in bolo-solo versions up to 2.6.4, specifically within the importMarkdownsSync function located in the BackupService.java file of the SnakeYAML component. This vulnerability allows an attacker to craft malicious input that can be remotely processed, potentially leading to unauthorized actions and exploitation. Since the details of the exploit have been publicly disclosed, it poses a risk for users of the affected product.

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Affected Version(s)

bolo-solo 2.6.0

bolo-solo 2.6.1

bolo-solo 2.6.2

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-2026-1691 - Proof of Concept

References

https://vuldb.com/?id.343485
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343485
signaturepermissions-required
https://vuldb.com/?submit.741899
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

MaoQiu (VulDB User)
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