Jiffy Intel — Threat intelligence for AI artifacts

Summary

Custom GPT whose instructions ask users to paste API keys into the conversation "to unlock advanced features." The keys are echoed into OpenAI's conversation log and, via an Action, potentially forwarded to a third party.

Severity & confidence

Severity

High

Credible abuse path with meaningful impact on confidentiality, integrity, or availability. Remediate on a short timeline; do not wait for the next sprint cycle.

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.

(?is)(?:paste|enter|provide)\s+(?:your\s+)?(?:api\s+key|token|secret)

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_000082
{
    meta:
        source = "jiffy-intel"
        severity = "high"
        description = "Auto-generated from Jiffy Intel indicators"
    strings:
    $content_pattern_0 = "(?is)(?:paste|enter|provide)\\s+(?:your\\s+)?(?:api\\s+key|token|secret)"
    condition:
        $content_pattern_0
}

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

Affected tools

Tool	Versions	Status
ChatGPT (GPT Store)	`*`	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.

Stock Analyzer GPTCustom GPT
Removed
Source
OpenAI GPT Store
First observed
Mar 3, 2026
Last observed
Mar 28, 2026
Crypto Assistant GPTCustom GPT
Removed
Source
OpenAI GPT Store
First observed
Mar 7, 2026
Last observed
Mar 31, 2026
Premium Search GPTCustom GPT
Under review
Source
OpenAI GPT Store
First observed
Mar 11, 2026

How to remediate

01Never paste API keys into a custom GPT conversation.
02Use OAuth-backed Actions with user-level consent instead.

Timeline & sources

Timeline

First observedMar 3, 20261 month ago
Last updatedApr 22, 2026today
PublishedMar 17, 20261 month ago

Sources

scanner

References

genai.owasp.orgOWASP

OWASP LLM-02: Sensitive Information Disclosure (2026)

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

attack.mitre.org

MITRE ATT&CK T1555 — Credentials from Password Stores

https://attack.mitre.org/techniques/T1555/

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

Custom GPT instructions request API keys "for enhanced features"

Summary

Severity & confidence

High

Confirmed

Indicators

Detection rule

Affected tools

Example artifacts

How to remediate

Timeline & sources

Timeline

Sources

References

OWASP LLM-02: Sensitive Information Disclosure (2026)

MITRE ATT&CK T1555 — Credentials from Password Stores

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