CVE-2026-121727

waiting for further signals

EUVD-2026-116585 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

jorisvink kore < 4.3.0

fixed in 4.3.0

CWE-191 Integer Underflow (Wrap or Wraparound)

ETK-2026-3417, permanent identifier

cvss8.7cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

1d 05h 13msince last run

24mAI analysis

timeline

0 = cve.org publication

trigger signal (cve.org) +0hwaiting for further signals+1h08m

+2h

+4h

+6h

+8h

+10h

+12h

description

Kore releases before 4.3.0 mishandle certain HTTP request body lengths, allowing the configured body-size limit to be bypassed. An unauthenticated remote client can cause excessive worker memory consumption when it can send requests to an exposed Kore service.

mitigation

Upgrade Kore to version 4.3.0 or later. Until upgraded, restrict access to affected HTTP endpoints and apply upstream request-size limits at a reverse proxy where possible.

fixed in 4.3.0

check

exploit

automation

–

auth required

EPSS

–

agent run time

24m

cve.org record, t = 0

2026-11-03 22:55Z

Δ to public poc

–

Δ to kev

–

outcome

No artifact: an exploit or check was attempted but could not be produced at this moment.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-11-03 22:55Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-121727

this entry in the feed

GET /api/v1/feed/CVE-2026-121727

{
  "etk_id": "ETK-2026-3417",
  "cve_id": "CVE-2026-121727",
  "display_id": "CVE-2026-121727",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-116585",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Integer underflow in Kore HTTP request body handling",
  "summary": "Kore releases before 4.3.0 mishandle certain HTTP request body lengths, allowing the configured body-size limit to be bypassed. An unauthenticated remote client can cause excessive worker memory consumption when it can send requests to an exposed Kore service.",
  "mitigation": "Upgrade Kore to version 4.3.0 or later. Until upgraded, restrict access to affected HTTP endpoints and apply upstream request-size limits at a reverse proxy where possible.",
  "vendor": "jorisvink",
  "product": "kore",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 4.3.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.3.0"
      ],
      "package_name": "kore",
      "purl": null
    }
  ],
  "cwes": [
    191
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 23.80507576666667,
  "t0_at": "2026-11-03T22:55:33.948000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-03T22:55:33.948000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-03T22:55:33.948000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-121727"
    }
  }
}

published 2026-11-03 23:39Z
last change 2026-11-05 05:05Z

Need the technical details behind an entry?

Every entry here shows what we attempted and when. The technical details, the generated exploit that fired it and the evidence behind the verdict are not public. Tell us about your use case and we’ll get back to you about extended API access.