OAuth client-secret disclosure via public extension bundle
Published Aug 31, 2026 · Updated Aug 31, 2026
Hard-coded credentials in The Inbox Foundry Limited ActiveInbox Extension 7.10.0 through 7.10.24 allow remote attackers to extract an OAuth secret. The publicly distributed dist/service-worker.production-esm.js bundle stores the value as unsafe_client_secret and assigns it to the client_secret parameter during OAuth token exchange. Anyone who obtains the extension package can recover the value without privileges or user interaction; direct user-token theft or account takeover is not established.
Summary
What happened
Hard-coded credentials in The Inbox Foundry Limited ActiveInbox Extension 7.10.0 through 7.10.24 allow remote attackers to extract an OAuth secret. The publicly distributed dist/service-worker.production-esm.js bundle stores the value as unsafe_client_secret and assigns it to the client_secret parameter during OAuth token exchange. Anyone who obtains the extension package can recover the value without privileges or user interaction; direct user-token theft or account takeover is not established.
The record
- CVE
- CVE-2026-82808
- Published
- Aug 31, 2026
- Updated
- Aug 31, 2026
- Vendor
- The Inbox Foundry Limited
- Product
- ActiveInbox Extension
- Classifications
- CWE-798, CWE-259, T1552.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Aug 31, 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.
- Affected versionversion=7.10.0
- Affected versionversion=7.10.1
- Affected versionversion=7.10.10
- Affected versionversion=7.10.11
- Affected versionversion=7.10.12
- Affected versionversion=7.10.13
- Affected versionversion=7.10.14
- Affected versionversion=7.10.15
- Affected versionversion=7.10.16
- Affected versionversion=7.10.17
- Affected versionversion=7.10.18
- Affected versionversion=7.10.19
- Affected versionversion=7.10.2
- Affected versionversion=7.10.20
- Affected versionversion=7.10.21
- Affected versionversion=7.10.22
- Affected versionversion=7.10.23
- Affected versionversion=7.10.24
- Affected versionversion=7.10.3
- Affected versionversion=7.10.4
- Affected versionversion=7.10.5
- Affected versionversion=7.10.6
- Affected versionversion=7.10.7
- Affected versionversion=7.10.8
- Affected versionversion=7.10.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- ActiveInbox 7.10.24 hardcoded Google OAuth client secret reproductionproof of concept · demonstrated
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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