CVE-2026-74932Network attack vector

Unauthenticated stored XSS via Host cache poisoning

Published Aug 25, 2026 · Updated Aug 25, 2026

Stored cross-site scripting in Emre Vona WP Fastest Cache before 1.5.1 allows remote attackers to run JavaScript in visitors' browsers. The cache generator embeds asset URLs derived from an unvalidated Host header while omitting that header from the cache key, persisting attacker-controlled server references. A forged Host request must populate the shared page cache; subsequent visitors then load the referenced JavaScript without further attacker access.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Emre Vona WP Fastest Cache before 1.5.1 allows remote attackers to run JavaScript in visitors' browsers. The cache generator embeds asset URLs derived from an unvalidated Host header while omitting that header from the cache key, persisting attacker-controlled server references. A forged Host request must populate the shared page cache; subsequent visitors then load the referenced JavaScript without further attacker access.

The record

CVE
CVE-2026-74932
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Emre Vona
Product
WP Fastest Cache
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=0.9.0.3 <1.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Emre Vona · WP Fastest Cacheversion=0.9.0.3 <1.5.1

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

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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