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CWE-484 (在Switch语句中省略Break语句) — Vulnerability Class 1

1 vulnerabilities classified as CWE-484 (在Switch语句中省略Break语句). AI Chinese analysis included.

MITRE CWE Description
The product omits a break statement within a switch or similar construct, causing code associated with multiple conditions to execute. This can cause problems when the programmer only intended to execute code associated with one condition. This can lead to critical code executing in situations where it should not.
Common Consequences (1)
OtherAlter Execution Logic
This weakness can cause unintended logic to be executed and other unexpected application behavior.
Mitigations (2)
ImplementationOmitting a break statement so that one may fall through is often indistinguishable from an error, and therefore should be avoided. If you need to use fall-through capabilities, make sure that you have clearly documented this within the switch statement, and ensure that you have examined all the logical possibilities.
ImplementationThe functionality of omitting a break statement could be clarified with an if statement. This method is much safer.
Examples (1)
In both of these examples, a message is printed based on the month passed into the function:
public void printMessage(int month){ switch (month) { case 1: print("January"); case 2: print("February"); case 3: print("March"); case 4: print("April"); case 5: print("May"); case 6: print("June"); case 7: print("July"); case 8: print("August"); case 9: print("September"); case 10: print("October"); case 11: print("November"); case 12: print("December"); } println(" is a great month"); }
Bad · Java
void printMessage(int month){ switch (month) { case 1: printf("January"); case 2: printf("February"); case 3: printf("March"); case 4: printf("April"); case 5: printff("May"); case 6: printf("June"); case 7: printf("July"); case 8: printf("August"); case 9: printf("September"); case 10: printf("October"); case 11: printf("November"); case 12: printf("December"); } printf(" is a great month"); }
Bad · C
CVE IDTitleCVSSSeverityPublished
CVE-2026-44075 Missing break in DSI OpenSession — Netatalk 3.7 Low2026-05-21

Vulnerabilities classified as CWE-484 (在Switch语句中省略Break语句) represent 1 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.