epsilla-cloud vectordb Filter expr.cpp ShuntingYard unusual condition

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18852
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 00:16:59 UTC
Updated2026-08-05 15:16:44 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 1.9 LOW from [email protected]

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.001120000 probability, percentile 0.015940000 (date 2026-08-07)

Problem Types: CWE-754 | CWE-754 Improper Check for Unusual Conditions

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary1.9LOWCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED4.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.1[email protected]Secondary3.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED3.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
3.0CNADECLARED3.3LOWCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
2.0[email protected]Secondary1.7AV:L/AC:L/Au:S/C:N/I:N/A:P
2.0CNADECLARED1.7AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Epsilla-cloud Vectordb affected 0.3.0 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.1 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.2 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.3 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.4 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.5 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.6 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.7 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.8 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.9 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.10 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.11 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.12 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.13 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.14 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.15 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.16 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.17 Not specified
CNA Epsilla-cloud Vectordb affected 0.3.18 Not specified
CNA Epsilla-cloud Vectordb affected df5a5f5afb85a2376a0f2f316c79dea9b2c6ac7a Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/385857/cti [email protected] vuldb.com
vuldb.com/submit/858196 [email protected] vuldb.com
github.com/fa1c4/security-advisories/tree/main/VectorDB [email protected] github.com
vuldb.com/cve/CVE-2026-18852 [email protected] vuldb.com
github.com/fa1c4/security-advisories/tree/main/VectorDB/PoC [email protected] github.com
vuldb.com/vuln/385857 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: fa1c4 (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-04T00:00:00.000ZAdvisory disclosed
CNA2026-08-04T02:00:00.000ZVulDB entry created
CNA2026-08-04T17:54:34.000ZVulDB entry last update

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