Hi,

The following vulnerability was published for m17n-lib.

CVE-2026-109854[0]:
| A flaw was found in m17n-lib. An attacker who supplies crafted input
| to an application processing ISO-2022 encoded text can cause the
| library to read uninitialized memory from the stack. If the
| application exposes or returns the decoded output, this flaw can
| result in unexpected behavior and limited information disclosure.

https://lists.gnu.org/archive/html/m17n-list/2026-10/msg00001.html
https://cgit.git.savannah.nongnu.org/cgit/m17n/m17n-lib.git/commit/?id=f3b85087f90189f91c04ba1b62c5f0b879ff2b20


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-109854
https://www.cve.org/CVERecord?id=CVE-2026-109854

Please adjust the affected versions in the BTS as needed.