What’s Vulnerable › Vulnerabilities

CVE-2026-18852: epsilla-cloud vectordb Filter expr.cpp ShuntingYard unusual condition

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-05 · updated 2026-10-23
• Weakness: CWE-754

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.

Affected products

• epsilla-cloud vectordb: 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.3.5 (+14)

References

• https://github.com/fa1c4/security-advisories/tree/main/VectorDB
• https://github.com/fa1c4/security-advisories/tree/main/VectorDB/PoC
• https://vuldb.com/cve/CVE-2026-18852
• https://vuldb.com/submit/858196
• https://vuldb.com/vuln/385857
• https://vuldb.com/vuln/385857/cti

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