Is CVE-2026-115327 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-115327 being exploited in the wild.

How severe is CVE-2026-115327?

Medium severity, with a CVSS score of 5.3, published 22 October 2026.

Is there a fix for CVE-2026-115327?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-115327 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-115327?

Check whether you run CESNET Libyang at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-115327: libyang uninitialized pointer free in NETCONF RPC parsing

CVE-2026-115327 · Severity: medium · CVSS 5.3 · Published 2026-10-22

libyang is a library that parses YANG data models used in network management systems like NETCONF. A vulnerability in the XML parser allows an attacker with a NETCONF session to send a specially crafted RPC action envelope that causes the server to crash or corrupt memory, potentially leading to service outage or code execution.

Technologies: CESNET Libyang. Vendors: CESNET.

Quick answers

Is CVE-2026-115327 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-115327 being exploited in the wild.
How severe is CVE-2026-115327?: Medium severity, with a CVSS score of 5.3, published 22 October 2026.
Which products and versions are affected?: CESNET Libyang through 6.4.13.
Is there a fix for CVE-2026-115327?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-115327 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-115327?: Check whether you run CESNET Libyang at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The lydxml_env_netconf_rpc() function in src/parser_xml.c fails to properly initialize a pointer before freeing it when parsing NETCONF RPC action envelopes containing non-whitespace text via lyd_parse_op(). An authenticated peer with an active NETCONF session can trigger this vulnerability to crash the server or corrupt the heap memory.

Affected products

CESNET libyang through 6.4.13

Timeline

2026-10-22: disclosed

References

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