trailofbits/anamorpher
image scaling attacks for multi-modal prompt injection observed · 2026-08-28
Health v2 · maintenance only
55/100
- Activity 83
- Release rhythm 35
- Longevity 27
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 378
- days_rel: n/a
- days_push: 106
- n_releases_24m: 0
Adoption not part of the score
1075 stars · 91 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Anamorpher is a tool for crafting and visualizing image scaling attacks that hide multi-modal prompt injections in images, revealed only when the image is downscaled. It provides a web frontend for comparing payload effectiveness across downscaling implementations (OpenCV, PyTorch, TensorFlow, Pillow) and a modular Python API for custom scaling implementations.
Use cases
- generate images that hide prompt injection payloads revealed on downscaling
- test whether a multimodal AI system is vulnerable to image scaling attacks
- compare bicubic, bilinear, and nearest neighbor downscaling implementations for attack susceptibility
- evaluate payload effectiveness across OpenCV, PyTorch, TensorFlow, and Pillow scaling
- research adversarial preprocessing attacks on vision-language models
- build custom downscaling implementations to test with the Python API
When to choose
- red-teaming or security-testing multimodal AI systems against image scaling prompt injection
- researching image-scaling attack vectors described in the Trail of Bits blog post
- you need a visual interface to compare downscaling algorithm behavior on adversarial images
When to avoid
- you need general-purpose image resizing or editing rather than attack payload generation
- you need a production-ready, stable tool - it is in active beta with probabilistic results
- your environment is Windows without WSL2, due to TensorFlow dependencies
Facets
application · maturity active
image-processing security penetration-testing machine-learning gui security machine-learning artificial-intelligence image-processing penetration-testing python adversarial-ml prompt-injection image-scaling-attack multimodal-ai red-team attack-tool linux macos web-server
1 source
- readme: https://github.com/trailofbits/anamorpher · fetched 2026-08-28 · eadfea653b39
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| trailofbits/anamorpher | main | 55 |
For agents
markdown · JSON · MCP: product_card(name="trailofbits/anamorpher")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem