VulnerabilityPublished 22 Jan 2026

CVE-2026-24006: lxsmnsyc seroval · Unthrottled Resource Allocation

Affects lxsmnsyc serovalSource CVE Database V5

Not known to be exploited · CVSS 7.5 High : upgrade to 1.4.1 soon.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.4.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade seroval and lxsmnsyc/seroval to 1.4.1.

Affected software

Product	Affected	Fixed in
lxsmnsycseroval	Affected <1.4.1	Fixed in 1.4.1
GitHublxsmnsyc/seroval`pkg:github/lxsmnsyc/seroval`Other threats	Affected <1.4.1	Fixed in 1.4.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade all instances of the lxsmnsyc seroval library to version 1.4.1 or later, which includes the depthLimit parameter to prevent excessive recursion.
Implement strict input validation and sanitization to limit the depth and complexity of objects accepted for serialization.
Employ runtime monitoring and anomaly detection to identify unusual serialization patterns or crashes indicative of exploitation attempts.
Integrate automated dependency management tools to track and update vulnerable libraries promptly.
Conduct code reviews and security testing focusing on serialization logic and resource consumption.
Where upgrading is not immediately feasible, consider sandboxing or isolating components that perform serialization to contain potential crashes.
Educate developers about secure serialization practices and the risks of processing untrusted data without limits.

Description

CVE-2026-24006 is a high-severity vulnerability in the lxsmnsyc seroval library versions prior to 1.4.1. The issue arises from the lack of limits on resource allocation during serialization of deeply nested JavaScript objects, leading to potential stack overflow and denial of service. The vulnerability does not impact confidentiality or integrity but can cause application crashes, affecting availability. Exploitation requires no privileges or user interaction and can be triggered remotely by processing crafted input. The vulnerability was addressed in version 1.4.1 by introducing a depthLimit parameter that throws an error when exceeded. European organizations using vulnerable versions of seroval in their software stacks, especially those handling complex data serialization, are at risk.

Impact

For European organizations, the primary impact of CVE-2026-24006 is on service availability. Applications that utilize seroval for serialization of JavaScript objects, especially those handling complex or user-supplied data, may experience crashes or denial of service when processing maliciously crafted inputs. This can disrupt business operations, degrade user experience, and potentially lead to downtime in critical systems. While confidentiality and integrity are not directly affected, the availability impact can indirectly affect business continuity and trust. Industries with high reliance on web applications, real-time data processing, or microservices architectures that incorporate seroval are particularly vulnerable. Additionally, organizations that do not promptly update dependencies or lack robust input validation mechanisms face increased risk. The absence of known exploits in the wild suggests a window for proactive mitigation before widespread attacks occur.

CWE-770Allocation of Resources Without Limits or Throttling (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #25
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
Requirements
Clearly specify the minimum and maximum expectations for capabilities, and dictate which behaviors are acceptable when resource allocation reaches limits.
Architecture and Design
Limit the amount of resources that are accessible to unprivileged users. Set per-user limits for resources. Allow the system administrator to define these limits. Be careful to avoid CWE-410.
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
OWASP ASVS 4.0.3
V8.1.4 (opens in a new tab)
V13.4.1 (opens in a new tab)
V11.1.4 (opens in a new tab)
Attack patterns
XML Ping of the Death (opens in a new tab)
Exponential Data Expansion (opens in a new tab)
Serialized Data Parameter Blowup (opens in a new tab)
Serialized Data with Nested Payloads (opens in a new tab)
Oversized Serialized Data Payloads (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Jan 2026, 08:54 UTC

WeaknessesCWE-770

Technical details

References

Community reviews

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