Heap-based Buffer Overflow Affecting vstakhov/libucl package, versions [,0.9.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-VSTAKHOVLIBUCL-10692596
- published11 Jul 2025
- disclosed23 Jun 2025
- creditJJLeo
Introduced: 23 Jun 2025
CVE-2025-6499 (opens in a new tab)How to fix?
Upgrade vstakhov/libucl to version 0.9.3 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the ucl_parse_multiline_string function. An attacker with local access can cause a lack of system availability by providing specially crafted input to this function during parsing operations.