Memory Allocation with Excessive Size Value Affecting github.com/getkin/kin-openapi/openapi3filter package, versions <0.142.0
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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- published24 Aug 2026
- disclosed21 Aug 2026
- creditmatiasinsaurralde
Introduced: 21 Aug 2026
NewCVE-2026-77354 (opens in a new tab)How to fix?
Upgrade github.com/getkin/kin-openapi/openapi3filter to version 0.142.0 or higher.
Overview
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value through sliceMapToSlice in openapi3filter/req_resp_decoder.go. An attacker can force multi-gigabyte heap allocation and a denial of service by sending a deepObject query parameter with a large array index, such as param[items][50000000]=x.