The vulnerability CVE-2026-22774 is characterized as a high-severity denial of service issue affecting the Svelte devalue library, specifically versions from 5.3.0 to 5.6.1. This vulnerability allows certain inputs to cause the devalue.parse function to consume excessive CPU time and memory. Such exploitation can potentially lead to a denial of service in systems that process untrusted input data.
The impact of this vulnerability is significant. Organizations using applications that rely on devalue.parse for processing externally supplied data are at risk. The root cause lies in the library's assumption regarding typed array hydration, which expects an ArrayBuffer as input without performing necessary checks. This issue has been fixed in version 5.6.2.
Given the nature of the vulnerability and its potential for exploitation, organizations should prioritize patching immediately. The CVSS score of 7.5 highlights the urgency for defenders to take action to protect their systems.
As of now, there are no known exploits or proofs of concept publicly available, reflecting a current lack of active exploitation in the wild. However, the potential for attackers to leverage this vulnerability remains a concern, emphasizing the importance of immediate remediation.
Organizations should assess their use of the affected versions of the devalue library and implement the necessary updates to mitigate this risk.
Vulnerability Details
The official description states that the Svelte devalue library is utilized for serializing values into strings when JSON.stringify is insufficient. With the identified vulnerability, certain inputs can lead to excessive consumption of CPU and memory resources. The issue was introduced in versions 5.3.0 through 5.6.1, with the vulnerability being resolved in version 5.6.2.
The vulnerability is classified under CWE-405, indicating that it represents a design flaw in the library's handling of typed arrays.
The CVSS score of 7.5 signifies a high severity level, with an attack vector of NETWORK, low attack complexity, and no privileges or user interaction required, making it particularly concerning for affected organizations.
Technical Analysis
The root cause of CVE-2026-22774 stems from the improper assumptions made during the typed array hydration process, where an ArrayBuffer is expected but not validated before the creation of the typed array. This oversight can be exploited by attackers providing crafted inputs that lead to excessive resource consumption.
The vulnerability is exploitable through a network attack vector, with low complexity and no requirements for user interaction or privileges, allowing attackers to easily target vulnerable applications.
The availability impact of this vulnerability is rated as high, which indicates that successful exploitation could render the affected services unavailable, causing disruption and potential financial loss.
Risk & Impact Analysis
The real-world implications of this vulnerability are significant, particularly for organizations that depend on the Svelte devalue library for processing potentially untrusted input data. The risk includes service disruptions that could lead to downtime, affecting user experience and trust.
In addition, the potential blast radius is considerable if this vulnerability is leveraged effectively by an attacker, allowing them to disrupt operations across multiple applications that utilize the affected library.
Given the CVSS score of 7.5 and the fact that it is not included in the KEV catalog, the urgency assessment remains high. Organizations must act quickly to remediate this vulnerability by upgrading to version 5.6.2 or later.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions affected by this vulnerability include all versions of the Svelte devalue library from 5.3.0 to 5.6.1. Organizations using these versions should upgrade to 5.6.2 or later to mitigate the risk.
Mitigation & Remediation
Organizations must take immediate action to address this vulnerability. The recommended remediation involves upgrading the Svelte devalue library to version 5.6.2 or later, which includes the necessary fixes.
In cases where the upgrade cannot be applied immediately, organizations should implement input validation and sanitization for all data processed by devalue.parse to mitigate potential denial of service risks.
For additional security, consider enhancing network monitoring to detect unusual patterns of CPU and memory usage that could indicate attempts to exploit this vulnerability.
Further details on the vulnerability and the patch can be found in the release notes available on the Svelte devalue GitHub repository.
For more guidance on penetration testing and vulnerability management, organizations may refer to the following resource: penetration testing services to ensure their systems remain secure.
Detection Guidance
Organizations should monitor their systems for the following indicators to detect potential exploitation of this vulnerability:
1. Unusual CPU and memory usage patterns that deviate from normal operational baselines.
2. Log entries indicating excessive processing times for requests that utilize devalue.parse.
3. Behavioral anomalies in applications that utilize the Svelte devalue library for processing input data.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-22774 highlights the ongoing challenges of ensuring that libraries handle untrusted input safely. This vulnerability exemplifies the critical importance of rigorous testing and validation in software development.
Security teams should take this incident as a reminder to frequently audit their dependencies for vulnerabilities and to incorporate automated tools that assist in identifying such issues proactively.
Incorporating a comprehensive vulnerability management program can significantly enhance an organization's resilience against similar vulnerabilities in the future.
Moreover, this incident stresses the value of engaging in penetration testing methodologies to identify weaknesses before they can be exploited.
Lastly, organizations should consider developing a robust strategy for security testing to continually assess and enhance the security posture of their applications.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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