CVE-2026-55209: resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read
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.
Published Aug 18, 2026
Affected packages
resdata
- Ecosystem
- PyPI
- Affected
- < 6.2.9
- Fixed in
- 6.2.9
- Check
pip show resdata
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
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.
Credited to oddmunds.
References
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology