CVE-2026-45392Network attack vector

Arbitrary JavaScript execution via DOM-based XSS

Published May 12, 2026 · Updated May 12, 2026

DOM-based XSS in Cribl Stream before 4.17.1 allows remote attackers to execute arbitrary JavaScript in an authenticated user's browser. Cribl has not published the DOM source, browser-side sink, or input-handling operation that allows crafted URL data to reach executable page context. Exploitation requires a crafted URL, an authenticated user, and interaction with the affected page; the reported impact is browser-context script execution.

CVSS severity8.4
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Cribl Stream before 4.17.1 allows remote attackers to execute arbitrary JavaScript in an authenticated user's browser. Cribl has not published the DOM source, browser-side sink, or input-handling operation that allows crafted URL data to reach executable page context. Exploitation requires a crafted URL, an authenticated user, and interaction with the affected page; the reported impact is browser-context script execution.

The record

CVE
CVE-2026-45392
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Cribl
Product
Cribl Stream
Classifications
CWE-20, CWE-79, CAPEC-588, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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 <4.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cribl · Cribl Streamversion=0 <4.17.1

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.4CriblCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.7CriblCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-588DOM-Based XSS
T1203Exploitation for Client Execution

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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