CRITICAL 9.8 GitHub
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.
Affected Products
- pip/resdata < 6.2.9
References
- https://github.com/advisories/GHSA-pr85-w493-9w3x
- https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x
- https://github.com/equinor/resdata/releases/tag/6.2.9
- https://github.com/advisories/GHSA-pr85-w493-9w3x
This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-08-18 via GitHub. Affected: pip/resdata < 6.2.9.
Risk Timeline
CVE Disclosed2026-08-18 · -1 days ago
Remediation Resources
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