CVE-2026-82810 (GCVE-0-2026-82810)
Vulnerability from cvelistv5 – Published: 2026-08-31 16:45 – Updated: 2026-08-31 16:45
VLAI
EPSS
VEX
Title
extension.vn 2FA Authenticator Extension Background Service Worker chrome.runtime.onMessageExternal.addListener information disclosure
Summary
A weakness has been identified in extension.vn 2FA Authenticator Extension 1.0.0.2 on Chrome. The impacted element is the function chrome.runtime.onMessageExternal.addListener of the component Background Service Worker. Executing a manipulation of the argument sender.id can lead to information disclosure. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.
Severity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397229 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397229/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82810 | third-party-advisory |
| https://vuldb.com/submit/875249 | third-party-advisory |
| https://github.com/xryj920/chrome_extensions/blob… | exploit |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| extension.vn | 2FA Authenticator Extension |
Affected:
1.0.0.2
cpe:2.3:a:extension.vn:2fa_authenticator_extension:*:*:*:*:*:*:*:* |
{
"containers": {
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:extension.vn:2fa_authenticator_extension:*:*:*:*:*:*:*:*"
],
"modules": [
"Background Service Worker"
],
"product": "2FA Authenticator Extension",
"vendor": "extension.vn",
"versions": [
{
"status": "affected",
"version": "1.0.0.2"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "DRXYJ (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness has been identified in extension.vn 2FA Authenticator Extension 1.0.0.2 on Chrome. The impacted element is the function chrome.runtime.onMessageExternal.addListener of the component Background Service Worker. Executing a manipulation of the argument sender.id can lead to information disclosure. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 1.7,
"vectorString": "AV:L/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "Information Disclosure",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Controls",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T16:45:09.367Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-397229 | extension.vn 2FA Authenticator Extension Background Service Worker chrome.runtime.onMessageExternal.addListener information disclosure",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/397229"
},
{
"name": "VDB-397229 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/397229/cti"
},
{
"name": "CVE-2026-82810 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-82810"
},
{
"name": "Submit #875249 | extension.vn 2FA Authenticator Chrome extension 1.0.0.2 Information Disclosure",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/875249"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/xryj920/chrome_extensions/blob/main/extension.vn%202FA%20Authenticator%201.0.0.2%20exposes%20stored%20TOTP%20secrets%20through%20an%20unrestricted%20external%20message%20handler"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-31T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-08-31T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-08-31T07:08:09.000Z",
"value": "VulDB entry last update"
}
],
"title": "extension.vn 2FA Authenticator Extension Background Service Worker chrome.runtime.onMessageExternal.addListener information disclosure",
"x_generator": [
"VulDB PVTS v202608"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-82810",
"datePublished": "2026-08-31T16:45:09.367Z",
"dateReserved": "2026-08-31T05:03:03.440Z",
"dateUpdated": "2026-08-31T16:45:09.367Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-82810\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-08-31T17:17:47.313\",\"lastModified\":\"2026-08-31T17:17:47.313\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A weakness has been identified in extension.vn 2FA Authenticator Extension 1.0.0.2 on Chrome. The impacted element is the function chrome.runtime.onMessageExternal.addListener of the component Background Service Worker. Executing a manipulation of the argument sender.id can lead to information disclosure. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.\"}],\"affected\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"extension.vn\",\"product\":\"2FA Authenticator Extension\",\"cpes\":[\"cpe:2.3:a:extension.vn:2fa_authenticator_extension:*:*:*:*:*:*:*:*\"],\"modules\":[\"Background Service Worker\"],\"versions\":[{\"version\":\"1.0.0.2\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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\",\"baseScore\":1.9,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":3.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:S/C:P/I:N/A:N\",\"baseScore\":1.7,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.1,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"},{\"lang\":\"en\",\"value\":\"CWE-284\"}]}],\"references\":[{\"url\":\"https://github.com/xryj920/chrome_extensions/blob/main/extension.vn%202FA%20Authenticator%201.0.0.2%20exposes%20stored%20TOTP%20secrets%20through%20an%20unrestricted%20external%20message%20handler\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/cve/CVE-2026-82810\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/875249\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/397229\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/397229/cti\",\"source\":\"cna@vuldb.com\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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