Improper Check in Filter Parser of epsilla-cloud vectordb
CVE-2026-18852

4.8MEDIUM

Key Information:

Vendor

Epsilla-cloud

Status
Vectordb
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18852?

A vulnerability has been identified in epsilla-cloud vectordb versions up to 0.3.18, specifically affecting the Filter Parser component, notably in the SplitTokens and ShuntingYard functions located within the engine/query/expr/expr.cpp file. This vulnerability arises from improper checks for unusual conditions, allowing potential local exploitation. Despite early disclosure attempts to the vendor, no response has been received. Users are advised to assess their systems for this vulnerability to mitigate possible impacts.

Affected Version(s)

vectordb 0.3.0

vectordb 0.3.1

vectordb 0.3.2

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-2026-18852 - Proof of Concept

References

https://vuldb.com/vuln/385857
vdb-entrytechnical-description
https://vuldb.com/vuln/385857/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18852
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
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

fa1c4 (VulDB User)
VulDB CNA Team
.