This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-103436 →

DEBIAN-CVE-2026-103436

apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.c...

Original description

The description as published by the source.

apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi. On the single-field path, when the matched STATUS line has fewer than three whitespace-separated tokens, sscanf("%*s %*s %s", answer) performs no assignment but the function returns success, and thus the caller prints the uninitialized destination buffer into the HTTP response.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 apcupsd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 apcupsd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 apcupsd

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org