CVE-2026-18852 Details
Description
A vulnerability has been found in epsilla-cloud vectordb up to 0.3.18/df5a5f5afb85a2376a0f2f316c79dea9b2c6ac7a. This impacts the function SplitTokens/ShuntingYard of the file engine/query/expr/expr.cpp of the component Filter Parser. Such manipulation leads to improper check for unusual conditions. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
A vulnerability exists in Epsilla-Cloud Vectordb versions through 0.3.18/df5a5f5afb85a2376a0f2f316c79dea9b2c6ac7a. The issue arises in the Filter Parser component, specifically within the SplitTokens/ShuntingYard function of the engine/query/expr/expr.cpp file. The vulnerability allows for improper handling of unusual conditions, particularly unmatched closing parentheses in filter expressions. This flaw can be exploited locally, causing the application to crash under a sanitized or hardened runtime by parsing a malformed expression. The parser's failure to correctly validate the expression leads to an empty operator stack being improperly managed, potentially causing memory corruption or undefined behavior.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 5, 2026CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fa1c4/security-advisories/tree/main/VectorDB | [email protected] | Vendor |
| https://github.com/fa1c4/security-advisories/tree/main/VectorDB/PoC | [email protected] | ExploitVendor |
| https://vuldb.com/cve/CVE-2026-18852 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/858196 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/385857 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/385857/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-754 | Improper Check for Unusual or Exceptional Conditions | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| epsilla-cloud vectordb | <= 0.3.18/df5a5f5afb85a2376a0f2f316c79dea9b2c6ac7a |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 5, 2026 | New CVE Received | [email protected] |