CVE-2026-2099: AgentFlow developed by Flowring has a Stored Cross-Site Scripting vulnerability, allowing authenticated remote

Q: How do I fix CVE-2026-2099?

agentflow: upgrade to 4.0.0.1878.877. Exact commands for each OS are on this page.

Q: Is CVE-2026-2099 being exploited?

CVE-2026-2099 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2099 affect?

CVE-2026-2099 affects agentflow. Severity is medium (CVSS 5.4). AgentFlow developed by Flowring has a Stored Cross-Site Scripting vulnerability, allowing authenticated remote attackers to inject persistent JavaScript codes that are executed in users' browsers upon page load.

Q: How urgent is CVE-2026-2099?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2026-2099 is a medium-severity flaw (CVSS 5.4) affecting agentflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AgentFlow developed by Flowring has a Stored Cross-Site Scripting vulnerability, allowing authenticated remote attackers to inject persistent JavaScript codes that are executed in users' browsers upon page load.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-10
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: flowring

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-10 07:16 UTCPublished CVE record published
2026-06-17 10:30 UTCUpdated Record last modified

flowring agentflow UPGRADE

Affected: < 4.0.0.1878.877

Fixed in: 4.0.0.1878.877

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy agentflow || rpm -q agentflow || agentflow --version

2. UPGRADE to 4.0.0.1878.877 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade agentflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade agentflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2099?

agentflow: upgrade to 4.0.0.1878.877. Exact commands for each OS are on this page.

Is CVE-2026-2099 being exploited?

CVE-2026-2099 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2099 affect?

CVE-2026-2099 affects agentflow. Severity is medium (CVSS 5.4). AgentFlow developed by Flowring has a Stored Cross-Site Scripting vulnerability, allowing authenticated remote attackers to inject persistent JavaScript codes that are executed in users' browsers upon page load.

How urgent is CVE-2026-2099?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2026-2098 MEDIUM 6.1 UPGRADE AgentFlow developed by Flowring has a Reflected Cross-site Scripting vulnerability, allowing unauthenticated r
CVE-2026-2097 HIGH 8.8 MITIGATE Agentflow developed by Flowring has an Arbitrary File Upload vulnerability, allowing authenticated remote atta
CVE-2026-2096 CRITICAL 9.8 MITIGATE Agentflow developed by Flowring has a Missing Authentication vulnerability, allowing unauthenticated remote at
CVE-2026-2095 CRITICAL 9.8 MITIGATE Agentflow developed by Flowring has an Authentication Bypass vulnerability, allowing unauthenticated remote at
CVE-2025-3709 CRITICAL 9.8 DOWNGRADE Agentflow from Flowring Technology has an Account Lockout Bypass vulnerability, allowing unauthenticated remot

References

← Back to latest CVEs