CVE-2026-120233: A security flaw has been discovered in ag-ui-protocol ag-ui up to 0.0.58

Routine

MEDIUM 5.3DOWNGRADE

CVE-2026-120233 is a medium-severity flaw (CVSS 5.3) affecting ag-ui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security flaw has been discovered in ag-ui-protocol ag-ui up to 0.0.58. This affects an unknown function of the file sdks/typescript/packages/client/src/agent/http.ts of the component HttpAgent. Performing a manipulation results in information disclosure. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-200, CWE-284
Published	2026-11-01
Last modified	2026-11-01

Publisher (CNA): VulDB · Vendor: ag-ui-protocol · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-01 15:15 UTCPublished CVE record published
2026-11-01 15:15 UTCUpdated Record last modified

ag-ui-protocol ag-ui DOWNGRADE

Affected: 0.0.1 · 0.0.2 · 0.0.3 · 0.0.4 · 0.0.5 · 0.0.6 · 0.0.7 · 0.0.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.0.1

1. Check installed version

apt-cache policy ag-ui || rpm -q ag-ui || ag-ui --version

2. No fixed release: DOWNGRADE to a release before 0.0.1 (Debian / Ubuntu)

apt-cache madison ag-ui sudo apt install ag-ui=<VERSION_BEFORE_0.0.1> sudo apt-mark hold ag-ui

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ag-ui sudo dnf downgrade ag-ui-<VERSION_BEFORE_0.0.1> sudo dnf versionlock add ag-ui

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Research and news

VulDB Recent Entries: CVE-2026-120233 | ag-ui-protocol ag-ui up to 0.0.58 HttpAgent http.ts information disclosure (Issue 2520) 2026-10-31

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-2026-120233?

ag-ui: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-120233 being exploited?

CVE-2026-120233 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-2026-120233 affect?

CVE-2026-120233 affects ag-ui. Severity is medium (CVSS 5.3). A security flaw has been discovered in ag-ui-protocol ag-ui up to 0.0.58. This affects an unknown function of the file sdks/typescript/packages/client/src/agent/http.ts of the component HttpAgent. Performing a manipulation results in inform

How urgent is CVE-2026-120233?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2026-120235 MEDIUM 4.3 DOWNGRADE A security vulnerability has been detected in ag-ui-protocol ag-ui up to 0.0.58
CVE-2026-120234 MEDIUM 4.3 DOWNGRADE A weakness has been identified in ag-ui-protocol ag-ui up to 0.0.58

References

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