# CESNET Libyang vulnerabilities

Source: https://junglewise.ai/threats/technologies/libyang  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/libyang.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in CESNET Libyang: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-115327, was published on 22 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 1
- Last 90 days: 1
- All time: 3 (0 critical, 0 exploited in the wild)

## About CESNET Libyang

libyang is a YANG data model parser and validator library.

## Latest CESNET Libyang vulnerabilities

- [CVE-2026-115327: libyang uninitialized pointer free in NETCONF RPC parsing](https://junglewise.ai/threats/cve-2026-115327-libyang-through-6-4-13-contains-an-uninitialized-pointer-free) (medium, CVSS 5.3, published 22 Oct 2026)
- [CVE-2026-41401: CESNET libyang heap use-after-free in lyd_parser_set_data_flags](https://junglewise.ai/threats/cve-2026-41401-cesnet-libyang-heap-use-after-free-in-lyd-parser-set-data-flags) (medium, CVSS 6.5, published 26 May 2026)
- [CVE-2026-44673: CESNET libyang heap buffer overflow in lyb_read_string](https://junglewise.ai/threats/cve-2026-44673-cesnet-libyang-heap-buffer-overflow-in-lyb-read-string) (high, CVSS 7.5, published 14 May 2026)

## Most severe CESNET Libyang vulnerabilities

- [CVE-2026-44673: CESNET libyang heap buffer overflow in lyb_read_string](https://junglewise.ai/threats/cve-2026-44673-cesnet-libyang-heap-buffer-overflow-in-lyb-read-string) (high, CVSS 7.5, published 14 May 2026)
- [CVE-2026-41401: CESNET libyang heap use-after-free in lyd_parser_set_data_flags](https://junglewise.ai/threats/cve-2026-41401-cesnet-libyang-heap-use-after-free-in-lyd-parser-set-data-flags) (medium, CVSS 6.5, published 26 May 2026)
- [CVE-2026-115327: libyang uninitialized pointer free in NETCONF RPC parsing](https://junglewise.ai/threats/cve-2026-115327-libyang-through-6-4-13-contains-an-uninitialized-pointer-free) (medium, CVSS 5.3, published 22 Oct 2026)

## Vulnerabilities per week

1 vulnerability 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 | 1 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other CESNET technologies

- [CESNET Ipfixcol2](https://junglewise.ai/threats/technologies/ipfixcol2): 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 Libyang vulnerabilities", https://junglewise.ai/threats/technologies/libyang, 11 November 2026.