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Purlpkg:deb/debian/lxml@5.4.0-1
Typedeb
Namespacedebian
Namelxml
Version5.4.0-1
Qualifiers
Subpath
Is_vulnerabletrue
Next_non_vulnerable_version6.1.0-1
Latest_non_vulnerable_version6.1.0-1
Affected_by_vulnerabilities
0
url VCID-jp88-wzxq-vyfn
vulnerability_id VCID-jp88-wzxq-vyfn
summary 
lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files
### Impact
Using either of the two parsers in the default configuration (with `resolve_entities=True`) allows untrusted XML input to read local files.

### Patches
lxml 6.1.0 changes the default to `resolve_entities='internal'`, thus disallowing local file access by default.

### Workarounds
Setting the `resolve_entities` option explicitly to `resolve_entities='internal'` or `resolve_entities=False` disables the local file access.

### Resources
Original report: https://bugs.launchpad.net/lxml/+bug/2146291

The default option was changed to `resolve_entities='internal'` for the normal XML and HTML parsers in lxml 5.0. The default was not changed for `iterparse()` and `ETCompatXMLParser()` at the time. lxml 6.1 makes the safe option the default for all parsers.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41066.json
reference_id
reference_type
scores
0
value 5.9
scoring_system cvssv3
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-41066.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2026-41066
reference_id
reference_type
scores
0
value 0.00031
scoring_system epss
scoring_elements 0.08881
published_at 2026-04-29T12:55:00Z
1
value 0.00032
scoring_system epss
scoring_elements 0.09121
published_at 2026-04-26T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2026-41066
2
reference_url https://bugs.launchpad.net/lxml/+bug/2146291
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1
value HIGH
scoring_system generic_textual
scoring_elements
2
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-24T18:03:40Z/
url https://bugs.launchpad.net/lxml/+bug/2146291
3
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41066
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41066
4
reference_url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
reference_id
reference_type
scores
0
value 5.9
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
5
reference_url https://github.com/lxml/lxml
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1
value HIGH
scoring_system generic_textual
scoring_elements
url https://github.com/lxml/lxml
6
reference_url https://github.com/lxml/lxml/releases/tag/lxml-6.1.0
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1
value HIGH
scoring_system generic_textual
scoring_elements
url https://github.com/lxml/lxml/releases/tag/lxml-6.1.0
7
reference_url https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfw
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1
value HIGH
scoring_system cvssv3.1_qr
scoring_elements
2
value HIGH
scoring_system generic_textual
scoring_elements
3
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-24T18:03:40Z/
url https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfw
8
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=2461613
reference_id 2461613
reference_type
scores
url https://bugzilla.redhat.com/show_bug.cgi?id=2461613
9
reference_url https://nvd.nist.gov/vuln/detail/CVE-2026-41066
reference_id CVE-2026-41066
reference_type
scores
url https://nvd.nist.gov/vuln/detail/CVE-2026-41066
10
reference_url https://github.com/advisories/GHSA-vfmq-68hx-4jfw
reference_id GHSA-vfmq-68hx-4jfw
reference_type
scores
0
value HIGH
scoring_system cvssv3.1_qr
scoring_elements
url https://github.com/advisories/GHSA-vfmq-68hx-4jfw
fixed_packages
0
url pkg:deb/debian/lxml@6.1.0-1
purl pkg:deb/debian/lxml@6.1.0-1
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/lxml@6.1.0-1
aliases CVE-2026-41066, GHSA-vfmq-68hx-4jfw
risk_score 4.0
exploitability 0.5
weighted_severity 8.0
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-jp88-wzxq-vyfn
Fixing_vulnerabilities
Risk_score4.0
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:deb/debian/lxml@5.4.0-1