Back to the CVE list
CVE-2026-120235

ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumption

CVSS score

5.3

EPSS probability

—

Risk score

0.5

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-120235: ag-ui-protocol ag-ui SSE Parser Resource Consumption Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A security vulnerability has been detected in ag-ui-protocol ag-ui up to version 0.0.58, affecting the parseSSEStream function within sdks/typescript/packages/client/src/transform/sse.ts. This flaw leads to resource consumption and can be initiated remotely.

Why does it matter?

This vulnerability allows attackers to trigger resource consumption on the target component. A patch identifier is available, and administrators should update the affected component to mitigate potential availability issues.

What should be done?

  • Upgrade the affected ag-ui component or follow vendor advisories
  • Apply the patch referenced by commit 9e7b2b00bce215bbf731f1e6094f63812527c432
  • Review associated pull requests and release notes
Chain of evidence and sources2 verified claims

ag-ui-protocol ag-ui 0.0.58 ve önceki sürümleri parseSSEStream fonksiyonunda kaynak tüketimi zafiyetinden etkilenmektedir.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet için 9e7b2b00bce215bbf731f1e6094f63812527c432 tanımlayıcısına sahip bir yama mevcuttur.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

A security vulnerability has been detected in ag-ui-protocol ag-ui up to 0.0.58. Affected is the function parseSSEStream of the file sdks/typescript/packages/client/src/transform/sse.ts of the component SSE Parser. The manipulation leads to resource consumption. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 9e7b2b00bce215bbf731f1e6094f63812527c432. The affected component should be upgraded.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

CWE: CWE-400, CWE-404

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-120235 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ag-ui-protocolag-ui View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.3CVSS V4_0MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:PCVE CNA
4.3CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LNVD
4.3CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:CCVE CNA
4.3CVSS V3_0MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:CCVE CNA
4.0CVSS V2—AV:N/AC:L/Au:S/C:N/I:N/A:PNVD
4.0CVSS V2_0—AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:CCVE CNA
2.1CVSS V40LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-120235 is associated with the following CWEs:

CWE-400: Common Weakness Enumeration Entry CWE-400CWE-404: Common Weakness Enumeration Entry CWE-404

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-120235 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

VDB-429594 | ag-ui-protocol ag-ui SSE Parser sse.ts parseSSEStream resource consumptionvendor-advisoryVDB-429594 | CTI Indicators (IOB, IOC, TTP, IOA)vendor-advisoryCVE-2026-120235 | CVE Analysis and Reportvendor-advisorySubmit #1015147 | ag-ui-protocol ag-ui <=0.0.58 CWE-400vendor-advisoryhttps://github.com/ag-ui-protocol/ag-ui/issues/2522vendor-advisoryhttps://github.com/ag-ui-protocol/ag-ui/pull/2627patchhttps://github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432patchhttps://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30patchhttps://github.com/ag-ui-protocol/ag-ui/vendor-advisory

CVSS Vector Radar Chart

5.3 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama doğrulandı

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

A
ag-ui-protocol logo
ag-ui-protocol

Weakness Type (CWE & CAPEC)

CWE-400 CWE-404

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-120235"
CVE-2026-120235 · ag-ui-protocol ag-ui SSE Parser sse.ts…