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Show HN: Dssrf – A safe‑by‑construction SSRF defense library for Node.js

2•relunsec•1h ago
I built dssrf, a safe-by-construction SSRF defense library for Node.js apps.

Most existing SSRF libraries rely on blacklists or regex checks, which are easy to bypass. dssrf takes a different approach based on normalization, DNS resolution, redirect validation, and IP classification.

Key features: – URL normalization RFC compliant – DNS resolution + IP classification – Redirect chain validation – IPv4/IPv6 safety – Rebinding detection – Protocol restrictions – TypeScript types included

The goal is to eliminate entire classes of classic SSRF vulnerability and it bypasses rather than patching individual payloads.

GitHub: https://github.com/HackingRepo/dssrf-js npm: https://www.npmjs.com/package/dssrf

I love feedback, edge cases, and contributions from the community.

Secondary school maths showing that AI systems don't think

https://www.raspberrypi.org/blog/secondary-school-maths-showing-that-ai-systems-dont-think/
1•zdw•2m ago•0 comments

Our History – DigiPen

https://www.digipen.edu/about/our-history
1•debo_•3m ago•0 comments

China leads research in 90% of technologies

https://www.nature.com/articles/d41586-025-04048-7
1•SirHumphrey•4m ago•0 comments

One Hundred Thousand Billion Poems

https://www.bevrowe.info/Internet/Queneau/Queneau.html
1•nickwrb•4m ago•0 comments

Show HN: Bookmarker – Save links, organize your knowledge

https://www.bookmarker.cc/
1•kaizenb•4m ago•0 comments

Is Entertainment Discovery Fundamentally Broken?

2•nicola_alessi•7m ago•0 comments

Show HN: Help validate startup ideas with synthetic customer interviews

https://market-echo.vercel.app/
2•emarboeuf•9m ago•0 comments

The EPA Was Considering a Lead Cleanup in Omaha. Then Trump Shifted Guidance

https://www.propublica.org/article/omaha-nebraska-lead-superfund-epa-trump
3•hn_acker•10m ago•1 comments

Are we ready to age longer? Study says no

https://longevity.technology/news/are-we-ready-to-age-longer-study-says-no/
1•Bender•10m ago•0 comments

Show HN: AI system 60x faster than ChatGPT – built by combat vet with no degree

3•thebrokenway•10m ago•1 comments

The Windows 1.0 Reunion

https://www.geekwire.com/2025/inside-the-windows-1-0-reunion-how-a-scrappy-team-shipped-the-produ...
1•aldto•10m ago•0 comments

Non-surgical brain-computer interface startup lands new funding

https://longevity.technology/news/non-surgical-brain-computer-interface-startup-lands-new-funding/
1•Bender•11m ago•0 comments

This is How I Grieve

https://twitter.com/CCPISASSH0E/status/1999219953774322051
1•keepamovin•11m ago•0 comments

String Theory Inspires a Brilliant, Baffling New Math Proof

https://www.quantamagazine.org/string-theory-inspires-a-brilliant-baffling-new-math-proof-20251212/
1•ArmageddonIt•11m ago•0 comments

Moving from Lightroom to Apple Photos

https://www.gyford.com/phil/writing/2025/12/12/lightroom-apple-photos/
1•speckx•12m ago•0 comments

Ford's Car of the Future, Hatched in a Skunk Works Near Los Angeles

https://www.nytimes.com/2025/12/11/business/ford-electric-vehicles-china.html
1•mikhael•12m ago•0 comments

'Dead Cells' Free for a Limited Time on Epic Games' iOS Store in the EU

https://www.macrumors.com/2025/12/12/epic-games-store-free-dead-cells-ios-eu/
3•tosh•12m ago•0 comments

Iron-sodium grid batteries just took a big step toward US rollout

https://electrek.co/2025/12/11/iron-sodium-grid-batteries-just-took-a-big-step-toward-us-rollout/
3•Bender•14m ago•0 comments

Utah Leaders Are Hindering Efforts to Develop Solar Despite Energy Supply Goal

https://www.propublica.org/article/utah-solar-energy-operation-gigawatt-spencer-cox
2•hn_acker•17m ago•1 comments

From Chips to Security, China Is Getting Much of What It Wants from the U.S.

https://www.nytimes.com/2025/12/12/world/asia/nvidia-china-trump-security-japan.html
2•mikhael•17m ago•0 comments

Around the World, Part 28: Scaling Up: Frozen Fractal

https://frozenfractal.com/blog/2025/12/12/around-the-world-28-scaling-up/
1•ibobev•17m ago•0 comments

Golden Iteration

https://www.johndcook.com/blog/2025/12/12/golden-iteration/
1•ibobev•17m ago•0 comments

Teens prepared for puberty report fewer mental health issues

https://medicalxpress.com/news/2025-11-teens-puberty-mental-health-issues.html
1•PaulHoule•18m ago•0 comments

Typeframe

https://www.typeframe.net/
1•ibobev•18m ago•0 comments

What if building an app was as simple as describing your idea out loud? [video]

https://www.youtube.com/watch?v=-kApTkD0wKw
2•rchachra•18m ago•0 comments

Crypto Entrepreneur Do Kwon Gets 15-Year Prison Sentence

https://www.wsj.com/finance/currencies/crypto-entrepreneur-do-kwon-gets-15-year-prison-sentence-1...
2•perihelions•19m ago•0 comments

Can AI bring trust to India's $5T real estate market? [video]

https://www.youtube.com/watch?v=ilN0VXnCxf4
1•rchachra•20m ago•0 comments

Researchers trained foundation model on 3M days of Apple Watch data

https://9to5mac.com/2025/12/09/researchers-used-3-million-days-of-apple-watch-data-to-train-a-dis...
2•brandonb•20m ago•0 comments

Eight Capital X YC F25

2•rchachra•21m ago•0 comments

PX: From laptop to cloud cluster within seconds

https://amontalenti.com/2025/12/11/px-launch-overview
3•AznHisoka•21m ago•0 comments