CVE-2026-93534Network attack vectorHinoki check available

Code execution via unsigned self-update download

Published Sep 18, 2026 · Updated Sep 18, 2026

Missing update integrity checks in Spatie Scotty 1.4.0 through 1.4.2 allow remote attackers to execute code via a tampered PHAR download. SelfUpdater::update accepts a downloaded PHAR after only nonempty and minimum-size checks, then replaces the running executable without verifying a cryptographic signature. Exploitation requires control over the release download and a user-triggered or accepted update; the replacement executes on the next invocation.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Missing update integrity checks in Spatie Scotty 1.4.0 through 1.4.2 allow remote attackers to execute code via a tampered PHAR download. SelfUpdater::update accepts a downloaded PHAR after only nonempty and minimum-size checks, then replaces the running executable without verifying a cryptographic signature. Exploitation requires control over the release download and a user-triggered or accepted update; the replacement executes on the next invocation.

The record

CVE
CVE-2026-93534
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Spatie
Product
Scotty
Classifications
CWE-494, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.0
  2. Affected versionversion=1.4.1
  3. Affected versionversion=1.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spatie · Scottyversion=1.4.0; version=1.4.1; version=1.4.2

Published CVSS scores

5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started