GNU Aspell vulnerabilities

8 CVEs affecting GNU Aspell, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-103658, published 2026-10-12.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2019-17544, published 2019-10-14. Critical severity, CVSS 9.1. EPSS: 3.3% chance of exploitation in the next 30 days. libaspell.a in GNU Aspell before 0.60.8 has a stack-based buffer over-read in acommon::unescape in common/getdata.cpp via an isolated \ character.
CVE-2019-20433, published 2020-01-27. Critical severity, CVSS 9.1. EPSS: 1.7% chance of exploitation in the next 30 days. libaspell.a in GNU Aspell before 0.60.8 has a buffer over-read for a string ending with a single '\0' byte, if the encoding is set to ucs-2 or ucs-4 outside of the application, as demonstrated by the…
CVE-2004-0548, published 2004-08-06. High severity, CVSS 7.2. EPSS: 0.9% chance of exploitation in the next 30 days. Multiple stack-based buffer overflows in the word-list-compress functionality in compress.c for Aspell allow local users to execute arbitrary code via a long entry in the wordlist that is not…
CVE-2019-25051, published 2021-07-20. High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days. objstack in GNU Aspell 0.60.8 has a heap-based buffer overflow in acommon::ObjStack::dup_top (called from acommon::StringMap::add and acommon::Config::lookup_list).
CVE-2026-103658, published 2026-10-12. Medium severity, CVSS 5.9. EPSS: 0.2% chance of exploitation in the next 30 days. GNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes…
CVE-2026-75818, published 2026-10-06. Low severity, CVSS 1.8. EPSS: 0.1% chance of exploitation in the next 30 days. GNU Aspell prezip-bin contains a heap-based buffer overflow vulnerability in the decompressor in prog/prezip.c. The decompressor does not properly check buffer space, so a crafted compressed file can…
CVE-2026-75820, published 2026-10-06. Low severity, CVSS 1.8. EPSS: 0.1% chance of exploitation in the next 30 days. GNU Aspell contains an integer truncation vulnerability in the WritableDict::add() function in modules/speller/default/writable.cpp. When loading a personal wordlist, the word length is stored as a…
CVE-2026-75819, published 2026-10-06. Low severity, CVSS 1.8. EPSS: 0.1% chance of exploitation in the next 30 days. GNU Aspell contains an out-of-bounds read vulnerability in ReadOnlyDict::load() in readonly_ws.cpp. When loading a binary .rws dictionary file, it uses offset fields from the file header as byte…