# CVE-2026-116124: GNOME libgsf heap buffer overflow in OLE2 parser

Source: https://junglewise.ai/threats/cve-2026-116124-a-security-vulnerability-has-been-detected-in-gnome-libgsf-up-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-116124 · Severity: medium · CVSS 6.3 · Published 2026-10-26

GNOME libgsf is a library used to parse spreadsheet and document formats. A heap buffer overflow in the OLE2 parser component could allow an attacker to crash the application or potentially execute arbitrary code when processing a specially crafted file.

Vendors: [Gnome](https://junglewise.ai/threats/vendors/gnome).

## Quick answers

**Is CVE-2026-116124 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116124 being exploited in the wild.

**How severe is CVE-2026-116124?** Medium severity, with a CVSS score of 6.3, published 26 October 2026.

**Which products and versions are affected?** Gnome Libgsf up to 1.14.60.

**Is there a fix for CVE-2026-116124?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-116124 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116124?** Check whether you run Gnome Libgsf 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.

## Technical details

A heap-based buffer overflow exists in the ole_info_read_metabat function within gsf/gsf-infile-msole.c of the OLE2 Parser component. The vulnerability can be triggered remotely by providing a malicious OLE file, leading to memory corruption and potential code execution. A patch is available via commit a8e25560b74f84c3f86df6ca0ac59195fa5af68a.

## Affected products

- GNOME libgsf up to 1.14.60

## Timeline

- 2026-10-26: disclosed

## References

- [https://gitlab.gnome.org/GNOME/libgsf/-/commit/a8e25560b74f84c3f86df6ca0ac59195fa5af68a](https://gitlab.gnome.org/GNOME/libgsf/-/commit/a8e25560b74f84c3f86df6ca0ac59195fa5af68a)
- [https://vuldb.com/cve/CVE-2026-116124](https://vuldb.com/cve/CVE-2026-116124)