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Security audit

hyperframes-audio

Security checks for vulnerabilities and agentic risk

Overview

This skill is a coherent HyperFrames audio-mixing helper; its file changes and local audio analysis are disclosed and tied to that purpose.

Before installing or running it, treat it as a project-modifying audio tool: run `--dry-run` first, review the selected bed and voice tracks, keep your composition under version control, and prefer pinned trusted versions for `hyperframes` and `@hyperframes/core` rather than ad hoc latest-package execution.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Behavioral ASTexec() Call, eval() Call, Dynamic Import
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (16)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 77)May include surrounding context.

md
script["scripts/carve.mjs<br/>detects the pair, dynamic by default"]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 283)May include surrounding context.

md
script["scripts/carve.mjs<br/>detects the pair, dynamic by default"]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 289)May include surrounding context.

md
script["scripts/carve.mjs<br/>detects the pair, dynamic by default"]

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 357)May include surrounding context.

md
script["scripts/carve.mjs<br/>detects the pair, dynamic by default"]

Rp1

Medium
Category
MCP Rug Pull
Confidence
90% confidence
Finding

The documentation instructs users to run npx hyperframes check without pinning an exact package version. npx may fetch the latest published package or resolve unexpectedly from the environment, which creates a supply-chain risk: a compromised or malicious newer release could execute code on the user's system during verification.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
93% confidence
Finding

The documentation instructs users to run npx hyperframes without pinning an exact package version. npx will fetch the latest published package if it is not already installed, so a compromised upstream release or typosquatted package update could execute attacker-controlled code on the user's machine. In a skill context, this is more dangerous because the command is presented as a normal remediation workflow users may copy-paste during troubleshooting.

Content

No source excerpt is available for this finding.

Rp1

Medium
Category
MCP Rug Pull
Confidence
93% confidence
Finding

This second command again uses npx hyperframes without a pinned version, creating the same supply-chain execution risk. Because this variant uses --write, it may also encourage users to run a network-fetched tool in a mode that modifies local project files, increasing the practical impact of malicious package behavior. The surrounding audio-mixing context does not reduce risk; it makes execution more likely because the command is framed as the recommended fix path.

Content

No source excerpt is available for this finding.

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 13)May include surrounding context.

md
## Filter — which frequencies a track may occupy

| Effect      | Parameter                                                                                                   |
| ----------- | ----------------------------------------------------------------------------------------------------------- |
| `highpass`  | `frequency` 20–20000 Hz (300, log) **AUTO** · `q` 0.1–20 (0.707, log) **AUTO** · `poles` `1`\|`2` (2)       |
| `lowpass`   | `frequency` 100–20000 Hz (8000, log) **AUTO** · `q` 0.1–20 (0.707, log) **AUTO** · `poles` `1`\|`2` (2)     |

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 27)May include surrounding context.

md
## Dynamics — how level behaves over time

| Effect       | Parameter                                                                                                                                                                      |
| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `gain`       | `gain` −60–12 dB (0) **AUTO**                                                                                                                                                  |
| `compressor` | `threshold` −60–0 dB (−24) · `ratio` 1–20 (4) · `attack` 0.01–2000 ms (20, log) · `release` 0.01–9000 ms (250, log) · `knee` 1–8 (2.83) · `makeup` 0–36 dB (0) · `mix` 0–1 (1) |

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 29)May include surrounding context.

md
| Effect       | Parameter                                                                                                                                                                      |
| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `gain`       | `gain` −60–12 dB (0) **AUTO**                                                                                                                                                  |
| `compressor` | `threshold` −60–0 dB (−24) · `ratio` 1–20 (4) · `attack` 0.01–2000 ms (20, log) · `release` 0.01–9000 ms (250, log) · `knee` 1–8 (2.83) · `makeup` 0–36 dB (0) · `mix` 0–1 (1) |
| `limiter`    | `limit` −24–0 dB (−1) · `attack` 0.1–80 ms (5) · `release` 1–8000 ms (50, log) · `level_out` −24–24 dB (0)                                                                     |
| `gate`       | `threshold` −80–0 dB (−35) · `range` −80–0 dB (−24) · `ratio` 1–20 (10) · `attack` 0.01–9000 ms (1, log) · `release` 0.01–9000 ms (100, log) · `knee` 1–8 (2.83)               |

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 42)May include surrounding context.

md
## Nonlinear — changes the waveform's shape

| Effect     | Parameter                                                                                                                                                                  |
| ---------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `saturate` | `type` `tanh`\|`atan`\|`cubic`\|`exp`\|`alg`\|`quintic`\|`sin`\|`erf`\|`hard` (tanh) · `threshold` −40–0 dB (−6) · `output` −24–24 dB (0) **AUTO** · `oversample` 1–8× (4) |
| `bitcrush` | `bits` 1–32 (8) · `samples` 1–250× (1) · `mix` 0–1 (1)                                                                                                                     |

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 45)May include surrounding context.

md
| Effect     | Parameter                                                                                                                                                                  |
| ---------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `saturate` | `type` `tanh`\|`atan`\|`cubic`\|`exp`\|`alg`\|`quintic`\|`sin`\|`erf`\|`hard` (tanh) · `threshold` −40–0 dB (−6) · `output` −24–24 dB (0) **AUTO** · `oversample` 1–8× (4) |
| `bitcrush` | `bits` 1–32 (8) · `samples` 1–250× (1) · `mix` 0–1 (1)                                                                                                                     |

`tanh` is the gentlest curve and `hard` is outright clipping. Higher `oversample`
costs more CPU and keeps aliasing down. `samples` repeats each sample N times — a

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/fx-registry.md (reported line 53)May include surrounding context.

md
## Time — space and width

| Effect   | Parameter                                                                                                                                                           |
| -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `delay`  | `time` 1–5000 ms (250, log) **AUTO** · `feedback` 0.01–0.95 (0.35) **AUTO** · `mix` 0–1 (0.4) **AUTO**                                                              |
| `reverb` | `size` 0.05–1 (0.7) · `damping` 0–1 (0.5) · `wet` 0–1 (0.35) **AUTO** · `dry` 0–1 (0.7) **AUTO**                                                                    |

Whitespace Padding

Medium
Category
Prompt Injection
Confidence
70% confidence
Finding

Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Content

Scanner excerpt · references/presets.md (reported line 74)May include surrounding context.

md
### Voice — make a real voice sound like its better self

| Preset            | Answers                         | Chain                                                                                               |
| ----------------- | ------------------------------- | --------------------------------------------------------------------------------------------------- |
| `voice-clean`     | "My voice sounds amateur"       | Remove Rumble → Reduce Mud → Even Out Loudness → Add Clarity → Peak Ceiling                         |
| `voice-broadcast` | "I want it to sound like radio" | Remove Rumble → Reduce Boxiness → Even Out Loudness → Add Clarity → Add Air → Warmth → Peak Ceiling |

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
79% confidence
Finding

This code rewrites the composition file in place via writeFileSync, which can alter user data and overwrite prior state. Although there is a --dry-run option and a final success message, there is no confirmation prompt before the write, and the top-level description does not explicitly warn that the input file will be modified in place.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
83% confidence
Finding

This code creates temporary directories, removes them recursively, writes files, creates symlinks, and later invokes a child process in tests. Although these are test operations, the file contains no explicit user-facing disclosure, confirmation, or warning that running the test will modify the local filesystem and execute subprocesses.

Content

No source excerpt is available for this finding.

Static analysis

Detected: suspicious.dangerous_exec

Shell command execution detected (child_process).

Critical
Code
suspicious.dangerous_exec
Location
scripts/carve.test.mjs:193