---
id: "CVE-2026-92822"
kind: "vulnerability"
aliases: ["CVE-2026-92822"]
title: "libmodulemd: deeply nested module metadata exhausts stack, crashing parser"
severity: "medium"
cvss: 6.2
epss: 0.00117
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["libmodulemd", "modularity", "package", "rpm-based-distros"]
not_affected_if: ["trusted-metadata-only"]
published_at: "2026-10-21T04:18:11+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T04:02:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92822", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-92822", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# libmodulemd: deeply nested module metadata exhausts stack, crashing parser

libmodulemd parses the xmd field of module metadata into nested GVariant values using recursive helpers with no depth or node-count limit. A crafted modulemd YAML file with deeply nested xmd content can exhaust the stack or consume excessive resources, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-92822
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-92822

## From the sources

A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_