CVE-2026-4992Public exploitNetwork attack vector

Shared-page modification via unneutralized share identifiers

Published Mar 27, 2026 · Updated Mar 27, 2026

HTML injection in Weights & Biases OpenUI 1.0 allows remote attackers to alter shared UI content through a crafted share identifier. The unauthenticated create_share and get_share routes use the id path value to select stored share JSON without neutralizing content before HTMLAnnotator renders it. Exploitation requires a victim to open the affected shared component; the reported consequence is browser-side content modification, not data disclosure or service interruption.

CVSS severity4.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in Weights & Biases OpenUI 1.0 allows remote attackers to alter shared UI content through a crafted share identifier. The unauthenticated create_share and get_share routes use the id path value to select stored share JSON without neutralizing content before HTMLAnnotator renders it. Exploitation requires a victim to open the affected shared component; the reported consequence is browser-side content modification, not data disclosure or service interruption.

The record

CVE
CVE-2026-4992
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
Weights & Biases
Product
OpenUI
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Weights & Biases · OpenUIversion=1.0

Published CVSS scores

4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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