unicode-normalization-bypass SKILL.md skillB
unicode-normalization-bypass from dreadnode/capabilities is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dreadnode/capabilities/unicode-normalization-bypass@git:20260504.2a64374Pins git:20260504.2a64374 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/unicode-normalization-bypass/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260504.2a64374, committed May 4, 2026
- Size
- 3,286 bytes
- Repository stars
- 22
- License
- MIT
Bypass WAFs and input filters using Unicode normalization equivalents (NFKC/NFKD). Use when WAF blocks payloads but application normalizes Unicode before processing.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Unicode Normalization Bypass ## Pattern - WAF blocking standard payloads but backend normalizes Unicode post-filter - Application accepts internationalized/multi-script input - Fullwidth, mathematical, or decorative Unicode characters accepted - Length-based restrictions with case mapping (Turkish locale edge cases) ## Probe **Substitutions** (WAF sees Unicode, app normalizes to ASCII): - `<` → `\uff1c` (fullwidth `<`) | `>` → `\uff1e` (fullwidth `>`) - `'` → `\uff07` (fullwidth) or `\u02bc` (modifier letter) - `/` → `\u2215` (division slash) or `\u2044` (fraction slash) - `"` → `\uff02` (fullwidth) | `.` → `\uff0e` (fullwidth) - `0-9` → `\uff10-\uff19` (fullwidth digits) - Script variants: `\U0001d4e2` (mathematical bold `s`), circled letters **Detection test**: submit `\U0001d543\u2147\U0001d664\U0001d4c3\u2148\U0001d530\U0001d525\U0001d4b6\U0001d65f` — if response reflects "Leonishan", normalization is active. **NFKC normalization** is most common (Kubernetes, Python `.casefold()`, Java `Normalizer`). **Unicode surrogates → wildcard injection** (Solr/Elasticsearch): - Lone surrogates like `\udc2a` are invalid UTF-8 and cannot be displayed …
Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/unicode-normalization-bypass@sha256:43865eee55ec2ce1The line at the top of this page pins the label git:20260504.2a64374, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yhtrx6wpuwu6fecc)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 4, 2026.
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3286 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
dreadnode/capabilities · 22 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yhtrx6wpuwu6fecc GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/unicode-normalization-bypass GET https://markdownregistry.com/api/v1/blob/43865eee55ec2ce1108fad34f2725f7de8d4537e0f4ebfedaa3ec1e36878fad8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.