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TI-2026-36233 Aliases CVE-2026-48977

OpenSlide: Arbitrary memory write with crafted Ventana BIF file

Priority LOW 36CWE-123Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

OpenSlide is a C library for reading whole slide image files. From 3.4.1 until 4.0.1, OpenSlide's parse_level0_xml() processing in src/openslide-vendor-ventana.c accepts nonpositive row or column tile counts from a crafted Ventana BIF file. The invalid counts produce attacker-controlled relative memory offsets and allow arbitrary values to be written at those offsets, affecting all supported platforms and configurations and resulting in a crash or potential arbitrary code execution. This issue is fixed in version 4.0.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00476 41st percentileScored 2026-11-07
Fix Fixed openslide (openslide): 4.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
openslideopenslide3.4.1 to before 4.0.14.0.1Patch availableCNA
  • openslide Vendoropenslide Affected 3.4.1 to before 4.0.1 Fixed in 4.0.1 Patch available CNA

Remediation

  • Fix · CNA openslide (openslide) Fixed in 4.0.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48977

References

Other 4

  • TI-2026-74914 Out-of-bounds read in OpenSlide MIRAX reader crashes apps CVSS 4.0MEDIUM 6.9
  • TI-2026-39437 OpenSlide: openslide_read_region() returns uninitialized memory with libtiff 4.7.1 CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences