Sensitive filtering data disclosure via public endpoints
Published Jun 3, 2026 · Updated Jun 3, 2026
Inadequate encryption in Securly Chrome Extension 3.0.7 and earlier allows remote attackers to read sensitive filtering data via public endpoints. Public endpoints return internal keyword lists, blocklists, and rule definitions as SHA-1 hashes protected only by a reversible Caesar cipher. No authentication or user interaction is required; reversing the obfuscation reveals the hash values and filtering logic, without reported integrity or availability impact.
Summary
What happened
Inadequate encryption in Securly Chrome Extension 3.0.7 and earlier allows remote attackers to read sensitive filtering data via public endpoints. Public endpoints return internal keyword lists, blocklists, and rule definitions as SHA-1 hashes protected only by a reversible Caesar cipher. No authentication or user interaction is required; reversing the obfuscation reveals the hash values and filtering logic, without reported integrity or availability impact.
The record
- CVE
- CVE-2026-8878
- Published
- Jun 3, 2026
- Updated
- Jun 3, 2026
- Vendor
- Securly
- Product
- Securly Chrome Extension
- Classifications
- CWE-326
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 3, 2026CVE publishedPublication date reported by the CVE source.
- Jun 3, 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?
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- Affected versionversion=0 <=3.0.7
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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