CVE-2026-75819: GNU Aspell out-of-bounds read in dictionary loading

CVE-2026-75819 · Severity: info · Published 2026-10-06

GNU Aspell is a spell-checker used by applications and users to check document spelling. An out-of-bounds read vulnerability in dictionary file parsing allows an attacker to disclose heap memory contents or crash the application when a user loads a malicious dictionary file. This could be exploited through configuration files or command-line options.

Technologies: Gnu Aspell. Vendors: Gnu.

Quick answers

Is CVE-2026-75819 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-75819 being exploited in the wild.
How severe is CVE-2026-75819?
Informational severity, published 6 October 2026.
Which products and versions are affected?
Gnu Aspell before 0.60.8.3.
Is there a fix for CVE-2026-75819?
Yes: fixed in 0.60.8.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-75819 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-75819?
Check whether you run Gnu Aspell at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 0.60.8.3

Technical details

The ReadOnlyDict::load() function in readonly_ws.cpp fails to validate offset fields from .rws dictionary file headers before using them as indices into a heap buffer, resulting in out-of-bounds read (CWE-125). An attacker can craft a malicious dictionary file and trigger the vulnerability when a user runs aspell with the file supplied via --master, --dict-dir, or configuration options. Exploitation enables heap memory disclosure or denial of service via application crash; a fix is available in version 0.60.8.3.

Affected products

  • GNU Aspell before 0.60.8.3

Timeline

  • 2026-10-06: disclosed
  • 2026-10-06: patched: Fix available in commit 941953b25031bc9104e83f58e138a664b8dedc3f, released in version 0.60.8.3

References

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