CVE catalog
CVE-2026-5439
A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed siz
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction.
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 | orthanc | sid | 1.13.0+dfsg-1 | fixed |
| Debian | orthanc | forky | 1.13.0+dfsg-1 | fixed |
| Debian | orthanc | trixie | 1.12.7+dfsg-4 | vulnerable |
| Debian | orthanc | bookworm | 1.10.1+dfsg-2+deb12u1 | vulnerable |
| Debian | orthanc | bookworm-security | 1.10.1+dfsg-2+deb12u1 | vulnerable |
| Cpe | orthanc | Not reported | Not reported | vulnerable |
| Cpe | orthanc | Not reported | 1.12.11 | fixed |
| Cpe | orthanc | Not reported | 1.12.11 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | orthanc | source | sid | 1.12.10+dfsg-4 | not yet assigned | Not reported | [1133182] |
| Debian | orthanc | source | forky | 1.12.10+dfsg-4 | not yet assigned | Not reported | [1133182] |
| Debian | orthanc | source | trixie | (unfixed) | not yet assigned | Not reported | [1133182] |
| Debian | orthanc | source | bookworm | (unfixed) | not yet assigned | Not reported | [1133182] |
| Cpe | orthanc | cpe | Not reported | 1.12.11 | Not reported | Not reported | Not reported |
| Cpe | orthanc | cpe | Not reported | 1.12.11 | Not reported | NVD-CVE-2026-5439 | Not reported |
Notes
[trixie] orthanc: Minor issue [bookworm] orthanc: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [liborthancframework1]Affected
Source package: [orthanc]
Details (4)
1.10.1+dfsg-2+deb12u1· amd64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· amd64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
- [liborthancframework-dev]Affected
Source package: [orthanc]
Details (4)
1.10.1+dfsg-2+deb12u1· amd64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· amd64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
- [orthanc]Affected
Details (4)
1.10.1+dfsg-2+deb12u1· amd64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· amd64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
- [orthanc-dev]Affected
Source package: [orthanc]
Details (4)
1.10.1+dfsg-2+deb12u1· amd64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· amd64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· arm64 · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
- [orthanc-doc]Affected
Source package: [orthanc]
Details (4)
1.10.1+dfsg-2+deb12u1· all · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· all · bookwormAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· all · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
1.10.1+dfsg-2+deb12u1· all · bookworm-securityAffected
nvd · orthanc · debian · bookworm; nvd · orthanc · debian · 12
[Debian 13 (Trixie)]
- [liborthancframework1]Affected
Source package: [orthanc]
Details (2)
1.12.7+dfsg-4· amd64 · trixieAffected
nvd · orthanc · debian · 13
1.12.7+dfsg-4· arm64 · trixieAffected
nvd · orthanc · debian · 13
- [liborthancframework-dev]Affected
Source package: [orthanc]
Details (2)
1.12.7+dfsg-4· amd64 · trixieAffected
nvd · orthanc · debian · 13
1.12.7+dfsg-4· arm64 · trixieAffected
nvd · orthanc · debian · 13
- [orthanc]Affected
Details (2)
1.12.7+dfsg-4· amd64 · trixieAffected
nvd · orthanc · debian · 13
1.12.7+dfsg-4· arm64 · trixieAffected
nvd · orthanc · debian · 13
- [orthanc-dev]Affected
Source package: [orthanc]
Details (2)
1.12.7+dfsg-4· amd64 · trixieAffected
nvd · orthanc · debian · 13
1.12.7+dfsg-4· arm64 · trixieAffected
nvd · orthanc · debian · 13
- [orthanc-doc]Affected
Source package: [orthanc]
Details (2)
1.12.7+dfsg-4· all · trixieAffected
nvd · orthanc · debian · 13
1.12.7+dfsg-4· all · trixieAffected
nvd · orthanc · debian · 13
Observed:
References
- [https://kb.cert.org/vuls/id/536588]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5439]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-5439]
- [https://security-tracker.debian.org/tracker/CVE-2026-5439]
- [https://www.machinespirits.de/]
- [https://www.orthanc-server.com/]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]