Jiffy Intel — Threat intelligence for AI artifacts

Summary

Extension with permissions on GitHub.com and VS Code tabs records the user's AI-assisted code suggestions and ships them to a telemetry endpoint. Code snippets frequently contain proprietary logic or secrets.

Severity & confidence

Severity

Medium

Notable weakness with plausible abuse chains or partial mitigations already in place. Track, and resolve as part of your normal hardening cadence.

Confidence

Confirmed

Observed directly by Jiffy scanners or validated by multiple independent sources. Indicators are reliable enough to drive automated action.

Indicators

Observed patterns and artifacts associated with this entry. Each indicator can be copied into your detection stack or SIEM.

```
(?i)host_permissions.{0,200}github\.com
```

Detection rule

A YARA-style pseudo-rule auto-generated from the indicators above. Useful as a starting point — adapt the syntax for your target detection platform.

YARA-style pseudo-rule

rule jiffy_ti_2026_000100
{
    meta:
        source = "jiffy-intel"
        severity = "medium"
        description = "Auto-generated from Jiffy Intel indicators"
    strings:
    $content_pattern_0 = "(?i)host_permissions.{0,200}github\\.com"
    condition:
        $content_pattern_0
}

Auto-generated from the indicators above. Adapt syntax for your detection stack before deploying.

Affected tools

Tool	Versions	Status
Chrome / Chromium	`*`	vulnerable
GitHub.com	`*`	vulnerable

Example artifacts

Sanitized examples of artifacts Jiffy has observed exhibiting this pattern. Publisher handles are redacted; version ranges and status reflect the most recent scan.

Code Snippet SaverExtension
Under review
Source
Chrome Web Store
First observed
Mar 13, 2026
Dev Analytics PlusExtension
Quarantined
Source
Chrome Web Store
First observed
Mar 17, 2026

How to remediate

01Strip extensions with broad host permissions on dev tooling domains.
02Use enterprise policy to block extension installs by default.

Timeline & sources

Timeline

First observedMar 13, 20261 month ago
Last updatedApr 26, 2026today
PublishedMar 27, 202621 days ago

Sources

scanner

References

genai.owasp.orgOWASP

OWASP LLM-02: Sensitive Information Disclosure (2026)

https://genai.owasp.org/llmrisk/llm-02-2026/

arxiv.orgarXiv

Browser Extension AI-Assistant Abuse (arXiv 2509.12033)

https://arxiv.org/abs/2509.12033

Related intel

Other entries of type Credential Exfil, or the most recent published entries if no same-type matches exist.

Credential ExfilHigh

.cursorrules fetches remote rule that encodes "submit secrets" logic

.cursorrules with `extends: <url>` resolves to a remote rule set whose content includes directives to read repo-local .env and post-process before any commit. A separation between policy declaration (local) and policy content (remote) hides the exfiltration.

Jiffy IntelApr 27

Credential ExfilHigh

Custom GPT Action logs full request bodies including Authorization headers

Action backend that logs every inbound request, including the OAuth Authorization header forwarded by the GPT. Logs are retained and occasionally shared with third-party observability tools.

Jiffy IntelApr 27

Credential ExfilLow

Claude Project knowledge file contains hardcoded API tokens

Project uploader accidentally includes a knowledge file (often a README or internal doc) that has API tokens embedded. Any team member running the project can view the file, and the tokens enter model context on every turn.

Jiffy IntelApr 27

Extension records Copilot suggestions across VS Code and GitHub.com

Summary

Severity & confidence

Medium

Confirmed

Indicators

Detection rule

Affected tools

Example artifacts

How to remediate

Timeline & sources

Timeline

Sources

References

OWASP LLM-02: Sensitive Information Disclosure (2026)

Browser Extension AI-Assistant Abuse (arXiv 2509.12033)

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