CVE-2026-35505

OFFIS DCMTK Toolkit Missing Release of Memory after Effective Lifetime

8.7 HighFix available

An unauthenticated remote attacker can repeatedly send crafted connection requests to leak memory. In single-process deployments the memory grows until the service is killed and the port stops responding until restart.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.65%Up 0.3 points since Jul 1, 2026

What each source reports

CVE List Score used 8.7

OFFIS DCMTK Toolkit Missing Release of Memory after Effective Lifetime

Record: CVE-2026-35505
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-401
Updated: 2026-11-02

EUVDEUVD-2026-40420 8.7

Record: EUVD-2026-40420
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-p8qm-mxfj-7vc2 8.7

An unauthenticated remote attacker can repeatedly send crafted connection requests to leak memory...

Record: GHSA-p8qm-mxfj-7vc2
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-401
Updated: 2026-11-02

NVD 8.7

Record: CVE-2026-35505
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-401
Updated: 2026-11-02

OSV 8.7

OFFIS DCMTK Toolkit Missing Release of Memory after Effective Lifetime

Record: CVE-2026-35505
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-401
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-35505 8.7

Record: DEBIAN-CVE-2026-35505
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-35505 8.7

Record: UBUNTU-CVE-2026-35505
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

offis dicom dcmtk toolkit

Affected packages

Affected packages
Package	Affected	Fixed
`dcmtk` Debian:12	All versions, plus listed versions 3.6.7-113.6.7-123.6.7-133.6.7-143.6.7-15 Show 35 moreShow less 3.6.7-83.6.7-93.6.7-9.13.6.7-9~deb12u13.6.7-9~deb12u23.6.7-9~deb12u33.6.7-9~deb12u43.6.8-13.6.8-23.6.8-33.6.8-43.6.8-53.6.8-63.6.8-73.6.8~git20221024.b8950f9-13.6.8~git20221024.b8950f9-23.6.8~git20221024.b8950f9-33.6.8~git20231027.1549d8c-13.6.8~git20231027.1549d8c-23.6.9-13.6.9-23.6.9-33.6.9-43.6.9-53.6.9-63.7.0+really3.6.9-13.7.0+really3.7.0-0+exp13.7.0+really3.7.0-13.7.0+really3.7.0-23.7.0+really3.7.0-33.7.0+really3.7.0-43.7.0+really3.7.0-53.7.0+really3.7.0-63.7.0+really3.7.0-73.7.0-1	None known
`dcmtk` Debian:13	before 3.6.9-5+deb13u3, plus listed versions 3.6.9-53.6.9-5+deb13u13.6.9-5+deb13u2	3.6.9-5+deb13u3
`dcmtk` Debian:14	before 3.7.0+really3.7.0-7, plus listed versions 3.6.9-53.6.9-63.7.0+really3.6.9-13.7.0+really3.7.0-0+exp13.7.0+really3.7.0-1 Show 6 moreShow less 3.7.0+really3.7.0-23.7.0+really3.7.0-33.7.0+really3.7.0-43.7.0+really3.7.0-53.7.0+really3.7.0-63.7.0-1	3.7.0+really3.7.0-7
`dcmtk` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.6.0-15.13.6.1~20150629-53.6.1~20150924-43.6.1~20150924-53.6.1~20150924-5ubuntu0.1~esm13.6.1~20150924-5ubuntu0.1~esm23.6.1~20150924-5ubuntu0.1~esm3	None known
`dcmtk` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 3.6.2-23.6.2-2build13.6.2-33.6.2-3build13.6.2-3build2 Show 4 moreShow less 3.6.2-3build33.6.2-3ubuntu0.1~esm13.6.2-3ubuntu0.1~esm23.6.2-3ubuntu0.1~esm3	None known
`dcmtk` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 3.6.4-2.13.6.4-2.1build13.6.4-2.1build23.6.4-2.1ubuntu0.1~esm13.6.4-2.1ubuntu0.13.6.4-2.1ubuntu0.1+esm13.6.4-2.1ubuntu0.23.6.4-2.1ubuntu0.2+esm1	None known
`dcmtk` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 3.6.5-13.6.6-3ubuntu13.6.6-3ubuntu23.6.6-43.6.6-53.6.6-5ubuntu0.1~esm13.6.6-5ubuntu0.1~esm2	None known
`dcmtk` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 3.6.7-93.6.7-9.1build23.6.7-9.1build33.6.7-9.1build43.6.7-9.1ubuntu0.1~esm1	None known
`dcmtk` Ubuntu:25.10	All versions, plus listed versions 3.6.9-43.6.9-53.6.9-5build1	None known
`dcmtk` Ubuntu:26.10	All versions, plus listed versions 3.7.0+really3.6.9-13.7.0+really3.7.0-23.7.0+really3.7.0-53.7.0+really3.7.0-63.7.0+really3.7.0-7ubuntu1	None known
`dcmtk` Ubuntu:26.04:LTS	All versions, plus listed versions 3.6.9-5build13.6.9-63.7.0+really3.6.9-1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35505 is a high vulnerability (CVSS 8.7) in Offis Dicom Dcmtk Toolkit, published June 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.65%, the 51st percentile. Fixed in dcmtk 3.6.9-5+deb13u3.