GHSA-pr85-w493-9w3x

resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-55209

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	resdata	< 6.2.9	6.2.9

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Prior to version 6.2.9 resdata would not correctly validate input in GRDECL files. The severity rating assumes that resdata is used to parse untrused files in a networking context such as a webservice. ### Patches The bug has been patched starting with version 6.2.9.

References

External links from the advisory. They lead to third-party sites.

https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x web
https://github.com/equinor/resdata package
https://github.com/equinor/resdata/releases/tag/6.2.9 web