Vulnerability in libxml2 library (CVE-2026-0992)
Summary
Vulnerability in libxml2 library (CVE-2026-0992). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-0992 has been found in libxml2 library.
Risk of unauthorized operations or information disclosure. CVSS score: 2.9/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "libxml2 library CVE-2026-0992" on the vendor's site.
CVE-2026-0992 (libxml2 library) — CWE-400 / CVSS v3 2.9
Attack vector: local / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-400) exists in libxml2 library.
Check the vendor advisory for the affected versions of libxml2 library.
Severity: Low (CVSS 2.9/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで libxml2 library を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-0992 libxml2 Fixed in: 2.9.10+dfsg-6.7+deb11u10
References
- advisory access.redhat.com
- advisory access.redhat.com
- advisory github.com
- advisory nvd.nist.gov
- report bugzilla.redhat.com
- report gitlab.gnome.org
- web access.redhat.com
- web access.redhat.com
- web catalog.redhat.com