CVE-2026-122127

waiting for further signals

EUVD-2026-117082 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

CESNET ipfixcol2 >= 2.7.1, < 2.9.0

fixed in 2.9.0

CWE-787 Out-of-bounds Write

ETK-2026-3541, 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

1h 36msince last run

2h 01mAI analysis

timeline

0 = cve.org publication

trigger signal (cve.org) +0hwaiting for further signals+2h31m

+4h

+6h

+8h

+10h

+12h

description

CESNET ipfixcol2 versions before 2.9.0 are affected by a heap buffer overflow in LZ4 decoding. An unauthenticated network peer can send malformed input that corrupts collector memory and can crash the service; exposure requires the collector to accept that peer's network traffic.

mitigation

Upgrade ipfixcol2 to version 2.9.0 or later. Until upgraded, restrict network access to the collector to trusted peers.

fixed in 2.9.0

check

exploit

automation

–

auth required

EPSS

–

agent run time

2h 01m

cve.org record, t = 0

2026-11-04 20:36Z

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.

2026-11-04 20:36Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-122127

this entry in the feed

GET /api/v1/feed/CVE-2026-122127

{
  "etk_id": "ETK-2026-3541",
  "cve_id": "CVE-2026-122127",
  "display_id": "CVE-2026-122127",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-117082",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Heap buffer overflow in CESNET ipfixcol2 LZ4 decoding",
  "summary": "CESNET ipfixcol2 versions before 2.9.0 are affected by a heap buffer overflow in LZ4 decoding. An unauthenticated network peer can send malformed input that corrupts collector memory and can crash the service; exposure requires the collector to accept that peer's network traffic.",
  "mitigation": "Upgrade ipfixcol2 to version 2.9.0 or later. Until upgraded, restrict network access to the collector to trusted peers.",
  "vendor": "CESNET",
  "product": "ipfixcol2",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.7.1, < 2.9.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "2.9.0"
      ],
      "package_name": "ipfixcol2",
      "purl": null
    }
  ],
  "cwes": [
    787
  ],
  "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": 121.49076061666666,
  "t0_at": "2026-11-04T20:36:48.956000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-04T20:36:48.956000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-04T20:36:48.956000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-122127"
    }
  }
}

published 2026-11-04 21:05Z
last change 2026-11-05 00:05Z

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