Libyaml perl: backtracking leading to exponential load time (CVE-2026-63676)
CVE-2026-63676 is a vulnerability in libyaml-perl characterized by backtracking that leads to exponential load time. This performance degradation can affect applications using the specified vulnerable versions of libyaml-perl. No CVSS score is provided, but the impact is considered medium severity due to performance implications rather than direct code execution or data compromise.
AI Analysis
Technical Summary
The vulnerability CVE-2026-63676 in libyaml-perl involves backtracking behavior that causes exponential load times when processing YAML data. This can significantly degrade performance in affected applications. The issue affects specific versions of libyaml-perl, including 1.13-1, 1.15-1, 1.21-1, 1.24-1, 1.29-1, 1.30-1, 1.30-2, and 1.31-1. There is no information about active exploitation or a CVSS score. No patch or remediation details are provided in the source data.
Potential Impact
The primary impact is performance degradation due to exponential load times caused by backtracking in YAML parsing. This can lead to denial of service conditions by slowing down or stalling applications that rely on libyaml-perl for YAML processing. There is no indication of code execution or data leakage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting the size and complexity of YAML inputs or using alternative YAML parsers if feasible.
Libyaml perl: backtracking leading to exponential load time (CVE-2026-63676)
Description
CVE-2026-63676 is a vulnerability in libyaml-perl characterized by backtracking that leads to exponential load time. This performance degradation can affect applications using the specified vulnerable versions of libyaml-perl. No CVSS score is provided, but the impact is considered medium severity due to performance implications rather than direct code execution or data compromise.
Affected software
pkg:deb/ubuntu/libyaml-perl?arch=source&distro=xenialpkg:deb/ubuntu/libyaml-perl?arch=source&distro=bionicpkg:deb/ubuntu/libyaml-perl?arch=source&distro=focalpkg:deb/ubuntu/libyaml-perl?arch=source&distro=jammypkg:deb/ubuntu/libyaml-perl?arch=source&distro=noblepkg:deb/ubuntu/libyaml-perl?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-63676 in libyaml-perl involves backtracking behavior that causes exponential load times when processing YAML data. This can significantly degrade performance in affected applications. The issue affects specific versions of libyaml-perl, including 1.13-1, 1.15-1, 1.21-1, 1.24-1, 1.29-1, 1.30-1, 1.30-2, and 1.31-1. There is no information about active exploitation or a CVSS score. No patch or remediation details are provided in the source data.
Potential Impact
The primary impact is performance degradation due to exponential load times caused by backtracking in YAML parsing. This can lead to denial of service conditions by slowing down or stalling applications that rely on libyaml-perl for YAML processing. There is no indication of code execution or data leakage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting the size and complexity of YAML inputs or using alternative YAML parsers if feasible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-63676
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
Threat ID: 6aa47ec255bf5e2cf5857a24
Added to database: 09/11/2026, 22:20:50 UTC
Last enriched: 09/11/2026, 22:33:57 UTC
Last updated: 09/11/2026, 23:43:34 UTC
Views: 3
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