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OWASP/CheatSheetSeries

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cached 2026-03-30T20:06:55.466Z

1mo ago

OWASP/CheatSheetSeries

OWASP/CheatSheetSeries is the official OWASP repository for a large collection of concise application security cheat sheets. It is active, popular, and widely forked, with 31,645 stars, 4,416 forks, and recent commits in March 2026. The repo is mainly documentation and site source for the published cheat sheets, with working markdown files, build scripts, linting, and containerized local build support.

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Stars31,645

Forks4,416

Default branchmaster

Last pushed2026-03-27T16:30:34Z

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Choose this fork only if you want a customized, mostly frozen appsec reference and are prepared to own long-term maintenance. For most adopters, upstream is the safer default because this fork is materially stale and appears to remove several current cheat sheets.

Choose upstream if you want current OWASP content and ongoing maintenance. Choose this fork only if you specifically want a heavily customized, stale snapshot and are willing to own the missing updates and removed material.

Choose this fork only if you want a heavily customized, older security-content base and are willing to maintain it yourself. If you want current OWASP guidance, active maintenance, and the full upstream catalog, upstream is the better default.

Choose this fork only if you want a legacy, heavily edited OWASP cheat sheet snapshot and are willing to own the maintenance gap. If you need current security guidance or broad topic coverage, upstream is the better default.

Choose this fork only if you want a customized 2021-era snapshot with local edits; choose upstream if you need current OWASP guidance, recent cheat sheets, and ongoing maintenance.

Choose this fork if you need a Chinese-language security reference and can tolerate lag behind upstream. Stick with upstream if you need the newest OWASP content, full coverage, and the official maintenance stream.

Prefer upstream unless you explicitly need a frozen, unloved snapshot. This fork adds no visible capabilities and is materially behind current OWASP content and fixes.

Prefer upstream unless you specifically need this exact fork identity or plan to add your own private changes. For most adopters, the fork is stale and adds no visible value over the active upstream project.

Choose this fork only if you explicitly want a stale, heavily customized 2022-era base. For most adopters, upstream is the better choice because it is far more current and actively maintained; this fork is best treated as a legacy or experimental derivative, not a drop-in replacement.

Prefer upstream unless you specifically want a customized, narrower fork and are willing to own ongoing merge and content-gap maintenance.

Fork comparison

ghostlulzhacks/CheatSheetSeries

38/100

stale

significant_divergence

Choose this fork only if you want a customized, mostly frozen appsec reference and are prepared to own long-term maintenance. For most adopters, upstream is the safer default because this fork is materially stale and appears to remove several current cheat sheets.

Likely purpose

A customized application-security cheat sheet collection for adopters who want an OWASP-based reference set with their own policy choices, wording, and selected topic coverage, rather than the continuously updated upstream project.

Best for

Teams that want a customized internal security handbook derived from OWASP content.; Users who prefer a frozen, curated snapshot over a fast-moving upstream project.; Organizations willing to maintain their own fork and reconcile drift manually.

Additional features

Custom guidance and rewrites in core sheets such as CSP, CSRF, .NET, HTML5, and Java security.
Topic-specific additions and updates around then-current practices, including strict CSP patterns and deprecated-reporting guidance.
A forked documentation corpus that can be republished or adapted without depending on the upstream release cadence.
Adds plugin, tool, or MCP-style extensibility beyond the upstream baseline.
Introduces more operational workflow surface such as server-side handling, auth, session control, or admin tooling.
Changes agent workflow behavior, such as prompt handling, handoffs, worktrees, memory, or orchestration flow.

Missing features

It is 200 commits behind upstream, so it misses years of OWASP updates and new sheets added after 2019.
Several upstream topics appear removed or hard-pruned, including Logging Vocabulary, XSS Filter Evasion, Java Security, Multi-Tenant Security, Kubernetes Security, Secrets Management, and AI Agent Security content.
Upstream’s current build, lint, and site-maintenance improvements are likely absent or outdated compared with the active official repository.
Some upstream plugin, tool, or MCP-style integration paths may be reduced or disabled.
Some upstream operational features such as auth, admin, or session handling may be reduced or absent.
It trails upstream by 200 commits, so some recent upstream features and fixes are likely not present yet.

Strengths

Can serve as a stable, opinionated snapshot for teams that want a frozen security handbook.
Large existing content base with broad appsec coverage.
May reflect stricter or more tailored recommendations than upstream in some sheets.

Risks

Stale relative to upstream, so recommendations may lag modern threats and current best practices.
Significant deletions mean adopters may lose coverage for important security topics.
High divergence makes future upstream merges and maintenance expensive.