CVE-2026-103436
Description
A flaw was found in apcupsd. This vulnerability allows a remote attacker to cause an information disclosure when querying Common Gateway Interface (CGI) monitoring scripts. When processing status lines with fewer data tokens than expected, the parsing logic fails to populate a destination buffer while still reporting success. Consequently, uninitialized stack memory is returned in the HTTP (Hypertext Transfer Protocol) response, potentially leaking sensitive internal data.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory; Read Application Data
When reusing a resource such as memory or a program variable, the original contents of that resource may not be cleared before it is sent to an untrusted party.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
The uninitialized resource may contain values that cause program flow to change in ways that the programmer did not intend.
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