Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-jqe4-44gw-wbhu
Vulnerability ID VCID-jqe4-44gw-wbhu
Aliases CVE-2026-32777
Summary libexpat: libexpat: Denial of Service via infinite loop in DTD content parsing
Status Published
Exploitability 0.5
Weighted Severity 3.8
Risk 1.9
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
System Score Found at
cvssv3 4.0 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32777.json
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-32777
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 4 https://github.com/libexpat/libexpat/issues/1161
ssvc Track https://github.com/libexpat/libexpat/issues/1161
cvssv3.1 4 https://github.com/libexpat/libexpat/pull/1159
ssvc Track https://github.com/libexpat/libexpat/pull/1159
cvssv3.1 4 https://github.com/libexpat/libexpat/pull/1162
ssvc Track https://github.com/libexpat/libexpat/pull/1162
cvssv3.1 4 https://issues.oss-fuzz.com/issues/486993411
ssvc Track https://issues.oss-fuzz.com/issues/486993411
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32777.json
https://api.first.org/data/v1/epss?cve=CVE-2026-32777
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-32777
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1131118 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1131118
1159 https://github.com/libexpat/libexpat/pull/1159
1161 https://github.com/libexpat/libexpat/issues/1161
1162 https://github.com/libexpat/libexpat/pull/1162
2447890 https://bugzilla.redhat.com/show_bug.cgi?id=2447890
486993411 https://issues.oss-fuzz.com/issues/486993411
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32777.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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/libexpat/libexpat/issues/1161
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/2026-03-16T14:55:22Z/ Found at https://github.com/libexpat/libexpat/issues/1161
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/libexpat/libexpat/pull/1159
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/2026-03-16T14:55:22Z/ Found at https://github.com/libexpat/libexpat/pull/1159
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/libexpat/libexpat/pull/1162
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/2026-03-16T14:55:22Z/ Found at https://github.com/libexpat/libexpat/pull/1162
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://issues.oss-fuzz.com/issues/486993411
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/2026-03-16T14:55:22Z/ Found at https://issues.oss-fuzz.com/issues/486993411
Exploit Prediction Scoring System (EPSS)
Percentile 0.01681
EPSS Score 0.00012
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:30:29.407026+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-32777.json 38.0.0