CVE-2026-4251Public exploit

Local credential disclosure via bundled plaintext JSON

Published Mar 16, 2026 · Updated Mar 16, 2026

Unprotected credential storage in CityData CityChat 0.12.0 through 0.12.6 for Android allows local users to read credentials from bundled assets. The ai.citydata.citychat package stores a Google Cloud service-account key as plaintext in resources/assets/flutter_assets/assets/credentials.json. A local user must extract the Android package or read its assets; disclosure enables access to associated Dialogflow data but does not alter the application or interrupt service.

CVSS severity2.5
Low
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unprotected credential storage in CityData CityChat 0.12.0 through 0.12.6 for Android allows local users to read credentials from bundled assets. The ai.citydata.citychat package stores a Google Cloud service-account key as plaintext in resources/assets/flutter_assets/assets/credentials.json. A local user must extract the Android package or read its assets; disclosure enables access to associated Dialogflow data but does not alter the application or interrupt service.

The record

CVE
CVE-2026-4251
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
CityData
Product
CityChat
Classifications
CWE-255, CWE-256, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.12.0
  2. Affected versionversion=0.12.1
  3. Affected versionversion=0.12.2
  4. Affected versionversion=0.12.3
  5. Affected versionversion=0.12.4
  6. Affected versionversion=0.12.5
  7. Affected versionversion=0.12.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

CityData · CityChatversion=0.12.0; version=0.12.1; version=0.12.2; version=0.12.3; version=0.12.4; version=0.12.5; version=0.12.6

Published CVSS scores

2.5NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
1.0NIST NVDAV:L/AC:H/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-255Credentials Management Errors
CWE-256Plaintext Storage of a Password
T1552.001Unsecured Credentials Credentials In Files

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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