CVE-2026-2098Network attack vector

User-browser script execution via phishing link

Published Feb 10, 2026 · Updated Feb 10, 2026

Reflected XSS in Flowring AgentFlow 4.0 before 4.0.0.1878.877 allows remote attackers to run JavaScript in a user's browser. The public advisory does not identify the affected endpoint or explain which request value is returned to a page without context-appropriate output encoding. Exploitation requires no account but depends on a victim opening an attacker-crafted phishing link; the script gains access to data and actions available within the AgentFlow browser origin.

CVSS severity5.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Flowring AgentFlow 4.0 before 4.0.0.1878.877 allows remote attackers to run JavaScript in a user's browser. The public advisory does not identify the affected endpoint or explain which request value is returned to a page without context-appropriate output encoding. Exploitation requires no account but depends on a victim opening an attacker-crafted phishing link; the script gains access to data and actions available within the AgentFlow browser origin.

The record

CVE
CVE-2026-2098
Published
Feb 10, 2026
Updated
Feb 10, 2026
Vendor
Bera Buddies
Product
AgentFlow
Classifications
CWE-79, CAPEC-591, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 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=4.0.* <4.0.0.1878.877

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bera Buddies · AgentFlowversion=4.0.* <4.0.0.1878.877

Published CVSS scores

5.1TWCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1TWCERT/CC CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4TWCERT/CC advisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
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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