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#appsec

Application security topics beyond the web, including mobile and desktop applications.

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🪟 Clickjacking: When a Missing X-Frame-Options Is a Real Bug

🪟 Clickjacking: When a Missing X-Frame-Options Is a Real Bug

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10 min read
Vulnerability assessment vs penetration testing: what two scanners found in 27 known flaws

Vulnerability assessment vs penetration testing: what two scanners found in 27 known flaws

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10 min read
I couldn't find an AI agent for AppSec audits, so I built one and benchmarked it on real CVEs

I couldn't find an AI agent for AppSec audits, so I built one and benchmarked it on real CVEs

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8 min read
What 191 AppSec job postings actually ask developers for (Nov 2026)

What 191 AppSec job postings actually ask developers for (Nov 2026)

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5 min read
đź§ź Old API Versions: Find the /v1 That Never Died, Then Prove It

đź§ź Old API Versions: Find the /v1 That Never Died, Then Prove It

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11 min read
Securing Agent-to-Agent Workflows: 10 Flaws to Spot

Securing Agent-to-Agent Workflows: 10 Flaws to Spot

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5 min read
How well do prompt injection defenses work? 1,800 trials, 4 defenses, 3 models

How well do prompt injection defenses work? 1,800 trials, 4 defenses, 3 models

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8 min read
ReDoS: catastrophic backtracking in a regex input check

ReDoS: catastrophic backtracking in a regex input check

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8 min read
Why MCP OAuth Discovery Leads to SSRF

Why MCP OAuth Discovery Leads to SSRF

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6 min read
The session list checked the owner, the session ID didn't: cross-project form-session IDOR in CommCare formplayer (GHSA-qjg7-cgv8-3c43)

The session list checked the owner, the session ID didn't: cross-project form-session IDOR in CommCare formplayer (GHSA-qjg7-cgv8-3c43)

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6 min read
PUT checked the project space, DELETE didn't: cross-tenant deletes in the CommCare HQ API (GHSA-hq38-78vf-f4cj)

PUT checked the project space, DELETE didn't: cross-tenant deletes in the CommCare HQ API (GHSA-hq38-78vf-f4cj)

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6 min read
A search box that JOINed to your token table: ORM filter injection in KoboToolbox (GHSA-xrq7-925g-qg5m)

A search box that JOINed to your token table: ORM filter injection in KoboToolbox (GHSA-xrq7-925g-qg5m)

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8 min read
SQL injection example: login bypass and UNION reads on a local API

SQL injection example: login bypass and UNION reads on a local API

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8 min read
Race condition vulnerability in a single-use coupon endpoint

Race condition vulnerability in a single-use coupon endpoint

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8 min read
IDOR vulnerability: a local example with PUT and DELETE

IDOR vulnerability: a local example with PUT and DELETE

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7 min read
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