CVE-2026-93649Network attack vectorHinoki check available

Malicious downloads via unnormalized redirect URL validation

Published Oct 15, 2026 · Updated Oct 15, 2026

Open redirect in Eclipse Temurin's download website allows remote attackers to deliver attacker-chosen binaries via crafted links. The Adoptium post-download page checks the raw link parameter with String.startsWith() before placing it in a meta refresh, allowing browser dot-segment normalization to escape the trusted repository path. Exploitation requires a victim to follow a crafted website link; downloading the substituted binary does not itself establish code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Open redirect in Eclipse Temurin's download website allows remote attackers to deliver attacker-chosen binaries via crafted links. The Adoptium post-download page checks the raw link parameter with String.startsWith() before placing it in a meta refresh, allowing browser dot-segment normalization to escape the trusted repository path. Exploitation requires a victim to follow a crafted website link; downloading the substituted binary does not itself establish code execution.

The record

CVE
CVE-2026-93649
Published
Oct 15, 2026
Updated
Oct 15, 2026
Vendor
The Eclipse Foundation
Product
Eclipse Temurin
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <1f9753c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Temurinversion=0 <1f9753c

Published CVSS scores

No CVSS assessment is available in this record.

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

No sourced classifications are available.

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

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Your stack

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