Catalogo CVE
CVE-2026-45186
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
- Gravità
- 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
- 0.48% · Oct 22, 2026
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
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 | expat | sid | 2.9.0-1 | fixed |
| Debian | expat | forky | 2.9.0-1 | fixed |
| Debian | expat | trixie | 2.8.3-1~deb13u1 | fixed |
| Debian | expat | trixie-security | 2.9.0-1~deb13u1 | fixed |
| Debian | expat | bookworm | 2.5.0-1+deb12u2 | vulnerable |
| Debian | expat | bookworm-security | 2.5.0-1+deb12u5 | fixed |
| Cpe | expat | Not reported | Not reported | vulnerable |
| Cpe | libexpat | Not reported | 2.8.1 | fixed |
| Cpe | libexpat | Not reported | 2.8.1 | fixed |
| Ubuntu | expat | noble | 2.6.1-2ubuntu0.5 | fixed |
| Ubuntu | libexpat1 | noble | 2.6.1-2ubuntu0.5 | fixed |
| Ubuntu | libexpat1-dev | noble | 2.6.1-2ubuntu0.5 | fixed |
| Alpine | expat | 3.20 | 2.8.1-r0 | fixed |
| Alpine | expat | 3.21 | 2.8.1-r0 | fixed |
| Alpine | expat | 3.22 | 2.8.1-r0 | fixed |
| Alpine | expat | 3.23 | 2.8.1-r0 | fixed |
| Alpine | expat | 3.24 | 2.8.1-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | expat | source | sid | 2.8.0-2 | not yet assigned | Not reported | [1136164] |
| Debian | expat | source | forky | 2.8.0-2 | not yet assigned | Not reported | [1136164] |
| Debian | expat | source | trixie | 2.8.2-1~deb13u1 | not yet assigned | Not reported | [1136164] |
| Debian | expat | source | bookworm | 2.5.0-1+deb12u4 | not yet assigned | Not reported | [1136164] |
| Cpe | libexpat | cpe | Not reported | 2.8.1 | Not reported | Not reported | Not reported |
| Cpe | libexpat | cpe | Not reported | 2.8.1 | Not reported | NVD-CVE-2026-45186 | Not reported |
| Ubuntu | expat | deb | noble | 2.6.1-2ubuntu0.5 | Not reported | Not reported | Not reported |
| Ubuntu | libexpat1 | deb | noble | 2.6.1-2ubuntu0.5 | Not reported | Not reported | Not reported |
| Ubuntu | libexpat1-dev | deb | noble | 2.6.1-2ubuntu0.5 | Not reported | Not reported | Not reported |
| Alpine | expat | apk | 3.20 | 2.8.1-r0 | Not reported | ALPINE-CVE-2026-45186 | Not reported |
| Alpine | expat | apk | 3.21 | 2.8.1-r0 | Not reported | ALPINE-CVE-2026-45186 | Not reported |
| Alpine | expat | apk | 3.22 | 2.8.1-r0 | Not reported | ALPINE-CVE-2026-45186 | Not reported |
| Alpine | expat | apk | 3.23 | 2.8.1-r0 | Not reported | ALPINE-CVE-2026-45186 | Not reported |
| Alpine | expat | apk | 3.24 | 2.8.1-r0 | Not reported | ALPINE-CVE-2026-45186 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [expat]Interessata
Dettagli (4)
2.5.0-1+deb12u2· amd64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u2· arm64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· amd64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· arm64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
- [libexpat1]Interessata
Pacchetto sorgente: [expat]
Dettagli (4)
2.5.0-1+deb12u2· amd64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u2· arm64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· amd64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· arm64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
- [libexpat1-dev]Interessata
Pacchetto sorgente: [expat]
Dettagli (4)
2.5.0-1+deb12u2· amd64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u2· arm64 · bookwormInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· amd64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
2.5.0-1+deb12u3· arm64 · bookworm-securityInteressata · Corretta:
2.5.0-1+deb12u4nvd · expat · debian · bookworm; nvd · expat · debian · 12
[Debian 13 (Trixie)]
- [expat]Interessata
Dettagli (6)
2.7.1-2· amd64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.7.1-2· arm64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.2-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· arm64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.9.0-1~deb13u1· amd64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
- [libexpat1]Interessata
Pacchetto sorgente: [expat]
Dettagli (6)
2.7.1-2· amd64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.7.1-2· arm64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.2-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· arm64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.9.0-1~deb13u1· amd64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
- [libexpat1-dev]Interessata
Pacchetto sorgente: [expat]
Dettagli (6)
2.7.1-2· amd64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.7.1-2· arm64 · trixieInteressata · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.2-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· amd64 · trixie-security · Historical versionCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.8.3-1~deb13u1· arm64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
2.9.0-1~deb13u1· amd64 · trixie-securityCorretta · Corretta:
2.8.2-1~deb13u1nvd · expat · debian · 13
Osservato:
Riferimenti
- [https://access.redhat.com/errata/RHSA-2026:22715]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_4619-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-45186]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-45186]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-45186]
- [https://security-tracker.debian.org/tracker/CVE-2026-45186]
- [https://ubuntu.com/security/notices/USN-8790-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1685.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]