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Weakness · BaseCWE-1284

CWE-1284: Improper Validation of Specified Quantity in Input

Base

As of 2026-10-05, CWE-1284 (Improper Validation of Specified Quantity in Input) underlies 6 CVEs tracked by Threadlinqs, none of them in the CISA Known Exploited Vulnerabilities catalog, and is cited by 11 tracked threats.

CVEs
6Mapped to CWE-1284
CISA KEV
0None listed yet
Critical
1CVSS v3 critical CVEs
Threats
11Tracked campaigns citing it
Likelihood
—MITRE likelihood of exploit

Last updated:

What is CWE-1284?

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Specified quantities include size, length, frequency, price, rate, number of operations, time, and others. Code may rely on specified quantities to allocate resources, perform calculations, control iteration, etc.

CWE-1284 is a base-level weakness in MITRE’s Common Weakness Enumeration. Applicable platforms: Not Language-Specific.

Source: MITRE CWE (CWE-1284 definition, reproduced verbatim). Counts and linkage below are Threadlinqs data.

Consequences

  • Other, Integrity, Availability — Varies by Context, DoS: Resource Consumption (CPU), Modify Memory, Read Memory. When the quantity is not properly validated, then attackers can specify malicious quantities to cause excessive resource allocation, trigger unexpected failures, enable buffer overflows, etc.

Source: MITRE CWE, common consequences.

How CWE-1284 is exploited in the wild

Threadlinqs maps 6 CVEs to CWE-1284, published between 2026-06-05 and 2026-10-03. None of them is in the CISA KEV catalog yet. By CVSS v3 severity the set splits into 1 critical, 2 high, 1 medium. The highest EPSS score in the set is 1.6% (CVE-2026-49777), the modelled probability of exploitation in the next 30 days. 11 tracked threats reference CWE-1284 directly or through a CVE it covers; the most recent is “Cosmos EVM Balance-Handling Flaw (GHSA-7g4w-cg88-2cq2) Actively Exploited Across Six Blockchains” (2026-08-28). Affected products concentrate in FOSSBilling (1), OpenBSD (1), ShapedPlugin, LLC (1), among 6 vendors in total.

Vulnerabilities (CVEs)

All 6 CVEs mapped to CWE-1284, CISA KEV first, then by CVSS score.

Affected vendors

  • FOSSBilling — 1 CVE
  • OpenBSD — 1 CVE
  • ShapedPlugin, LLC — 1 CVE
  • The HDF Group — 1 CVE
  • Themeum — 1 CVE
  • tornadoweb — 1 CVE

Threat activity

11 tracked threats cite CWE-1284:

Mitigations

  • Implementation / Input Validation: Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid

Source: MITRE CWE, potential mitigations.

Detection methods (MITRE CWE)

  • Automated Static Analysis: Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

Source: MITRE CWE, detection methods. Threadlinqs detection rules for the threats above are Blue tier and higher.