auditing-session-lifecycle-and-fixation SKILL.md skillA
auditing-session-lifecycle-and-fixation from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-session-lifecycle-and-fixation@git:20260823.e797ed0Pins git:20260823.e797ed0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-session-lifecycle-and-fixation/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260823.e797ed0, committed Aug 23, 2026
- Size
- 10,118 bytes
- Repository stars
- 26
- License
- MIT
Audit how an application issues, rotates, and destroys session identifiers, so an attacker cannot fixate or outlive a session. Covers a session identifier not regenerated at login or privilege change, a logout that clears the client cookie but leaves the server session valid, a session that never expires or has no idle or absolute timeout, an identifier accepted from a URL or a header an attacker can seed, a session cookie missing the secure, http-only, or same-site attributes, and a cookie…
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
# Auditing session lifecycle and fixation: whether a session is rotated, scoped, and destroyed A session identifier can be perfectly random and still be a bug, because the attack is not guessing it but controlling its lifecycle. If the identifier issued to an anonymous visitor survives unchanged into their authenticated session, an attacker who planted it now holds that session; if logout clears only the client cookie, a captured identifier stays valid; if nothing expires, a stolen identifier lives forever. This audit assumes the identifier is unguessable, that is a separate concern, and asks whether it is rotated at the right moments, invalidated when it should be, timed out, and scoped so only the right party can hold it. You audit it by reading the login, privilege-change, and logout paths and the cookie attributes, against the framework's session defaults. The discipline is checking those defaults first, because the rotation or the attribute is often set centrally, not at the call site. ## When to use - You are reviewing authentication, logout, or session-management code, or the cookie attributes it sets. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-session-lifecycle-and-fixation@sha256:534cb98745407772The line at the top of this page pins the label git:20260823.e797ed0, 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_hnnokjok7gc4dkvl)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 23, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10118 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
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hnnokjok7gc4dkvl GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-session-lifecycle-and-fixation GET https://markdownregistry.com/api/v1/blob/534cb98745407772689fb00ee2e7425d86c92ecea0c2887380d988e19ba940a0
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.