OSV-2026-634 Index-out-of-bounds in sas7bdat_submit_columns_if_needed
An index-out-of-bounds error in the SAS data parsing library can cause a crash when processing malicious files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2026-634?
OSV-2026-634 is a memory corruption vulnerability in readstat, published on 27 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=506459940
Crash type: Index-out-of-bounds
Crash state:
sas7bdat_submit_columns_if_needed
sas7bdat_parse_all_pages_pass2
readstat_parse_sas7bdat
Which versions are affected by OSV-2026-634?
1 open source package ship an affected version, including readstat.
| Package | Affected | Fixed in |
|---|---|---|
readstat OSS-Fuzz | All versions | None |
How do I fix OSV-2026-634?
No fix has been published for OSV-2026-634 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2026-634 being exploited?
There is no known exploitation of OSV-2026-634 in the wild and no public exploit code.