CVE-2026-120235

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

Products / packages ag-ui-protocol ag-ui

Published 01/11/2026, 16:00:21 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:40:44 UTC

VulDB · CVSS:4.0 · 5.3

Assessment 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

VulDB · CVSS:3.1 · 4.3

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

VulDB · CVSS:3.0 · 4.3

Assessment vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

VulDB · CVSS 2 / source score · 4

Assessment vector

AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C

The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

medium5.3

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Exploit reference published

Source-linked evidence; not proof of attacks in the wild or independent validation.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

The ag-ui-protocol ag-ui up to version 0.0.58 has a resource consumption vulnerability in the parseSSEStream function of the SSE Parser component. The attack may be initiated remotely. This leads to resource consumption.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

ag-ui-protocol · VulDB

ag-ui

58 ranges

VulDB version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

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

0.0.9

0.0.10

0.0.11

0.0.12

0.0.13

0.0.14

0.0.15

0.0.16

0.0.17

0.0.18

0.0.19

0.0.20

0.0.21

0.0.22

0.0.23

0.0.24

0.0.25

0.0.26

0.0.27

0.0.28

0.0.29

0.0.30

0.0.31

0.0.32

0.0.33

0.0.34

0.0.35

0.0.36

0.0.37

0.0.38

0.0.39

0.0.40

0.0.41

0.0.42

0.0.43

0.0.44

0.0.45

0.0.46

0.0.47

0.0.48

0.0.49

0.0.50

0.0.51

0.0.52

0.0.53

0.0.54

0.0.55

0.0.56

0.0.57

0.0.58

Other versions: unknown

Product identifiers (CPE)

cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.

ag-ui-protocol/ag-ui · issues/2522 ↗Attributed to VulDB

Original source description

Read the full publisher description

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.

References

9 sources

ag-ui-protocol/ag-ui · pull request #2627

PatchVulDB

ag-ui-protocol/ag-ui · commit 9e7b2b0

PatchVulDB

ag-ui-protocol/ag-ui · releases/tag/release/2026-10-30

PatchVulDB

VulDB · advisory #429594

Security advisoryVulDB

VulDB · threat intelligence #429594

Security advisoryVulDB

VulDB · CVE-2026-120235

Security advisoryVulDB

View 3 more references

VulDB · submission #1015147

Source referenceVulDB

ag-ui-protocol/ag-ui · issues/2522

Public exploit referenceVulDB

ag-ui-protocol/ag-ui · repository

Source referenceVulDB

Inside the record

Evidence available

Package identity · not supplied

Version evidence

Remediation guidance · not supplied

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-120235

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-400 ↗

Resource Consumption

VulDB

CWE-404 ↗

Denial of Service

VulDB

Contributing organizations · 2

VulDB

Assigning organization

2026-11-01

CISA-ADP

Additional data publisher

2026-11-02

Timeline

All times UTC

1 Nov 2026, 16:00
Advisory published
Publication date supplied by the source.
2 Nov 2026, 17:41
Source updated
Latest modification date supplied by the source.
2 Nov 2026, 17:57
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-1202352026-11-02

Observed 2026-11-02T17:57:03.889Z · upstream updated 2026-11-02T17:41:44.705Z

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-02T17:15:20.466792Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "poc"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-02

Exploitation: poc
Automatable: no
Technical Impact: partial

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-120235

Enrichment coverage

NVDNo result

Checked 01/11/2026, 16:10:31 UTC

GHSANo result

Checked 01/11/2026, 16:10:31 UTC

EUVDNo result

Checked 01/11/2026, 16:10:31 UTC

EPSSNo result

Checked 01/11/2026, 16:10:31 UTC

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

Severity and exploitation

What this means

Attack conditions

Affected versions

ag-ui

affected

unaffected

unknown

What to do

Public exploit evidence

Original source description

References

Inside the record

Evidence available

Original records

Underlying weaknesses

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed