# CESNET Ipfixcol2 vulnerabilities

Source: https://junglewise.ai/threats/technologies/ipfixcol2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/ipfixcol2.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in CESNET Ipfixcol2: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-122130, was published on 4 November 2026. 3 vulnerabilities in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 3
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About CESNET Ipfixcol2

NetFlow and IPFIX flow data collector for network traffic analysis.

## Latest CESNET Ipfixcol2 vulnerabilities

- [CVE-2026-122130: CESNET ipfixcol2 integer overflow in Forwarder plugin](https://junglewise.ai/threats/cve-2026-122130-cesnet-ipfixcol2-2-3-0-before-2-9-0-contains-an-integer-overflow) (high, CVSS 8.2, published 4 Nov 2026)
- [CVE-2026-122129: CESNET ipfixcol2 memory exhaustion in LZ4 decoder](https://junglewise.ai/threats/cve-2026-122129-cesnet-ipfixcol2-2-7-1-before-2-9-0-contains-a-memory-allocation) (medium, CVSS 5.3, published 4 Nov 2026)
- [CVE-2026-122127: CESNET ipfixcol2 heap buffer overflow in LZ4 decompression](https://junglewise.ai/threats/cve-2026-122127-cesnet-ipfixcol2-2-7-1-before-2-9-0-contains-a-heap-based-buffer) (high, CVSS 7.5, published 4 Nov 2026)

## Most severe CESNET Ipfixcol2 vulnerabilities

- [CVE-2026-122130: CESNET ipfixcol2 integer overflow in Forwarder plugin](https://junglewise.ai/threats/cve-2026-122130-cesnet-ipfixcol2-2-3-0-before-2-9-0-contains-an-integer-overflow) (high, CVSS 8.2, published 4 Nov 2026)
- [CVE-2026-122127: CESNET ipfixcol2 heap buffer overflow in LZ4 decompression](https://junglewise.ai/threats/cve-2026-122127-cesnet-ipfixcol2-2-7-1-before-2-9-0-contains-a-heap-based-buffer) (high, CVSS 7.5, published 4 Nov 2026)
- [CVE-2026-122129: CESNET ipfixcol2 memory exhaustion in LZ4 decoder](https://junglewise.ai/threats/cve-2026-122129-cesnet-ipfixcol2-2-7-1-before-2-9-0-contains-a-memory-allocation) (medium, CVSS 5.3, published 4 Nov 2026)

## Vulnerabilities per week

3 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 3 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other CESNET technologies

- [CESNET Libyang](https://junglewise.ai/threats/technologies/libyang): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "CESNET Ipfixcol2 vulnerabilities", https://junglewise.ai/threats/technologies/ipfixcol2, 12 November 2026.