Integer Overflow or Wraparound Affecting CESNET/libyang package, versions [,5.4.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-CESNETLIBYANG-16700555
- published15 May 2026
- disclosed14 May 2026
- creditdom-omg5.4.9
Introduced: 14 May 2026
NewCVE-2026-44673 (opens in a new tab)How to fix?
Upgrade CESNET/libyang to version 5.4.9 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound through the lyb_read_string function in src/parser_lyb.c when parsing a specially crafted LYB binary blob. An attacker can cause a crash or corrupt the heap by supplying malicious LYB data to a consumer of the library.