Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-1rcd-tvec-q7e5
Vulnerability ID VCID-1rcd-tvec-q7e5
Aliases CVE-2026-41080
Summary libexpat: expat: libexpat: Denial of Service via hash flooding with crafted XML
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-331 Insufficient Entropy
System Score Found at
cvssv3 3.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41080.json
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-41080
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-41080
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-41080
cvssv3.1 2.9 https://blog.hartwork.org/posts/expat-2-8-0-released/
cvssv3.1 7.5 https://blog.hartwork.org/posts/expat-2-8-0-released/
ssvc Track https://blog.hartwork.org/posts/expat-2-8-0-released/
cvssv3.1 2.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 2.9 https://github.com/libexpat/libexpat/issues/47
cvssv3.1 7.5 https://github.com/libexpat/libexpat/issues/47
ssvc Track https://github.com/libexpat/libexpat/issues/47
cvssv3.1 2.9 https://github.com/libexpat/libexpat/pull/1183
cvssv3.1 7.5 https://github.com/libexpat/libexpat/pull/1183
ssvc Track https://github.com/libexpat/libexpat/pull/1183
cvssv3.1 2.9 https://www.openwall.com/lists/oss-security/2026/04/26/1
cvssv3.1 7.5 https://www.openwall.com/lists/oss-security/2026/04/26/1
ssvc Track https://www.openwall.com/lists/oss-security/2026/04/26/1
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41080.json
https://api.first.org/data/v1/epss?cve=CVE-2026-41080
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41080
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1 https://www.openwall.com/lists/oss-security/2026/04/26/1
1134732 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1134732
1183 https://github.com/libexpat/libexpat/pull/1183
2458967 https://bugzilla.redhat.com/show_bug.cgi?id=2458967
47 https://github.com/libexpat/libexpat/issues/47
expat-2-8-0-released https://blog.hartwork.org/posts/expat-2-8-0-released/
RHSA-2026:11004 https://access.redhat.com/errata/RHSA-2026:11004
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41080.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://blog.hartwork.org/posts/expat-2-8-0-released/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://blog.hartwork.org/posts/expat-2-8-0-released/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-18T02:32:34Z/ Found at https://blog.hartwork.org/posts/expat-2-8-0-released/
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/libexpat/libexpat/issues/47
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/libexpat/libexpat/issues/47
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-18T02:32:34Z/ Found at https://github.com/libexpat/libexpat/issues/47
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/libexpat/libexpat/pull/1183
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/libexpat/libexpat/pull/1183
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-18T02:32:34Z/ Found at https://github.com/libexpat/libexpat/pull/1183
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://www.openwall.com/lists/oss-security/2026/04/26/1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://www.openwall.com/lists/oss-security/2026/04/26/1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-18T02:32:34Z/ Found at https://www.openwall.com/lists/oss-security/2026/04/26/1
Exploit Prediction Scoring System (EPSS)
Percentile 0.02133
EPSS Score 0.00013
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:30:25.554550+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41080.json 38.6.0