CVE catalog

CVE-2026-54604

openslide: CVE-2026-54604

Severity: Medium · CVSS 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Sep 17, 2026, 9:17:17 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.53% · Oct 25, 2026

OpenSlide is a C library for reading whole slide image files. Prior to 4.0.1, a behavior change in libtiff 4.7.1 causes the indirect TIFF tile path in src/openslide-decode-tiff.c and _openslide_tiff_read_tile() to request a full-height destination for a partial bottom tile row, allowing uninitialized heap memory to enter pixel data returned by openslide_read_region(). A crafted but valid slide can trigger the issue in TIFF-based formats other than Hamamatsu NDPI when a network service renders attacker-provided slides. Successful extraction depends on pixel transparency handling and recompression, OpenSlide with libtiff 4.7.0 or earlier is not affected, and official binary builds 4.0.0.10 and 4.0.0.11 are affected. This issue is fixed in OpenSlide 4.0.1 and official binary build 4.0.0.12.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	openslide	sid	`4.0.1+dfsg-2`	fixed
Debian	openslide	forky	`4.0.1+dfsg-2`	fixed
Debian	openslide	trixie	`3.4.1+dfsg-7+deb13u1`	vulnerable
Debian	openslide	bookworm	`3.4.1+dfsg-6+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openslide	source	sid	`4.0.1+dfsg-1`	not yet assigned	Not reported	[1146705]
Debian	openslide	source	forky	`4.0.1+dfsg-1`	not yet assigned	Not reported	[1146705]
Debian	openslide	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1146705]
Debian	openslide	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1146705]

[Debian bug #1146705]

Notes

[trixie] openslide: Minor issue; only an exploitable issue with behaviour change of libtiff in 4.7.1 [bookworm] openslide: Minor issue; only exploitable with the libtiff 4.7.1 behaviour change

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libopenslide0]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-6+deb12u1 · amd64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12
- 3.4.1+dfsg-6+deb12u1 · arm64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12
[libopenslide-dev]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-6+deb12u1 · amd64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12
- 3.4.1+dfsg-6+deb12u1 · arm64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12
[openslide-tools]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-6+deb12u1 · amd64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12
- 3.4.1+dfsg-6+deb12u1 · arm64 · bookworm
  Affected
  dsa · openslide · debian · bookworm; dsa · openslide · debian · 12

[Debian 13 (Trixie)]

[libopenslide0]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-7+deb13u1 · amd64 · trixie
  Affected
  dsa · openslide · debian · 13
- 3.4.1+dfsg-7+deb13u1 · arm64 · trixie
  Affected
  dsa · openslide · debian · 13
[libopenslide-dev]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-7+deb13u1 · amd64 · trixie
  Affected
  dsa · openslide · debian · 13
- 3.4.1+dfsg-7+deb13u1 · arm64 · trixie
  Affected
  dsa · openslide · debian · 13
[openslide-tools]Affected
Source package: [openslide]
Details (2)
- 3.4.1+dfsg-7+deb13u1 · amd64 · trixie
  Affected
  dsa · openslide · debian · 13
- 3.4.1+dfsg-7+deb13u1 · arm64 · trixie
  Affected
  dsa · openslide · debian · 13

Observed: Oct 23, 2026, 8:36:59 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]