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Project

Z3

Z3 is an open-source SMT solver from Microsoft Research used for automated theorem proving, program verification, and bug finding.

Known aliases

  • Z3 prover
  • Z3 SMT solver
  • Z3 solver
  • Z3 theorem prover

Current stories

securityConfirmed4 publishers

China-based actor targets U.S. Rejetto HFS servers through a forgeable admin cookie

VulnCheck says a China-based actor began targeting vulnerable U.S. Rejetto HFS servers on October 1, exploiting CVE-2026-61500 to forge admin sessions. The fix shipped in July as version 3.2.1. Exposed instances that have not updated are reachable now.

Perspective Coverage

4 publishers
Builder
Builder 43%
Operator
Operator 47%
Investor
Investor 10%

Reality

Evidence62
Adoption
Not scored
Hype gap+30
Incentives50
Confidence60
buildOne report1 publisher

A Z3 solver found an AWS deny policy covered four of nine compute-launch privesc paths

Bala Paranj ran a 2022 AWS privilege-escalation case through a Z3 solver and found its six-action deny policy blocked four of nine compute-launch vectors. Expanding the list to all nine leaves a residual, because each new compute service AWS ships opens a fresh bypass path.

Publishers:dev.to

Reality

Evidence55
Adoption
Not scored
Hype gap+35
Incentives
Not scored
Confidence50
buildOne report1 publisher

A starts-with key condition lets one signed S3 upload write anywhere under the prefix

Four HackerOne reports cited in a dev.to analysis trace to S3 write scope set wider than the one object an upload needs. Only one of them is the starts-with key condition that turns a signed upload form into write access across a whole prefix.

Publishers:dev.to

Reality

Evidence45
Adoption
Not scored
Hype gap+25
Incentives35
Confidence55
buildOne report1 publisher

A week to prove zlib: verification starts looking like a line item, not a luxury

An interview with Lean's founder says an AI translated C zlib into Lean and proved compress-then-decompress round-trips in about a week. The remaining work is optimization without breaking the proof.

Publishers:dev.to

Reality

Evidence25
Adoption35
Hype gap+40
Incentives65
Confidence30
buildOne report1 publisher

Scoping iam:AttachUserPolicy to the caller's own ARN hands out AdministratorAccess

A policy that lets users read and manage their own IAM profile usually carries iam:AttachUserPolicy scoped to ${aws:username}. That scope is enough to attach AdministratorAccess to yourself in a single call.

Publishers:dev.to

Reality

Evidence66
Adoption
Not scored
Hype gap+20
Incentives70
Confidence56
buildOne report1 publisher

Seven calls to a secret, with zero Secrets Manager permissions on paper

A CloudGoat walkthrough moves an API key through SNS into API Gateway and back out of Lambda. Access Analyzer and PMapper both report the user has no access.

Publishers:dev.to

Reality

Evidence52
Adoption
Not scored
Hype gap+34
Incentives72
Confidence46