High
python-mkdocs — security advisory
The mkdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain :sensitive information. NOTE: the vendor has disputed this as described in https://github.com/mkdocs/mkdocs/issues/2601.] and https://github.com/nisdn/CVE-2021-40978/issues/1
- Products
- python-mkdocs
- Affected versions
- 1.4.2+dfsg-2, 1.5.2+dfsg-1, 1.5.3+dfsg-1, 1.5.3+dfsg-2, 1.6.1+dfsg-1, 1.6.1+dfsg-2, 1.6.1+dfsg-3, 1.6.1+dfsg1-1, 1.6.1+dfsg1-2, 1.6.1+dfsg1-3, 1.6.1+dfsg1-4, 1.6.1+dfsg1-5
- Fixed versions
- Not specified
- CVEs
- CVE-2021-40978
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:35 UTC · Revision 1
Source evidence
The mkdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain :sensitive information. NOTE: the vendor has disputed this as described in https://github.com/mkdocs/mkdocs/issues/2601.] and https://github.com/nisdn/CVE-2021-40978/issues/1
osv:DEBIAN-CVE-2021-40978
python-mkdocs
Fixed versions: Not specified
python-mkdocs
Fixed versions: Not specified
python-mkdocs
Fixed versions: Not specified
Complete source record
{
"id": "e8c2dad6133fad34ce45a945f35b95d85dedd9358298c1dea20bd69a25fb679b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-40978",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2021-40978",
"summary": "The mkdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain :sensitive information. NOTE: the vendor has disputed this as described in https://github.com/mkdocs/mkdocs/issues/2601.] and https://github.com/nisdn/CVE-2021-40978/issues/1",
"evidence": "osv:DEBIAN-CVE-2021-40978",
"products": [
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"evidence": "/affected/0/package/name"
},
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{
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},
{
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"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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"affected_versions": [
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{
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},
{
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],
"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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"package": {
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"purl": "pkg:deb/debian/python-mkdocs?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
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"1.6.1+dfsg-2",
"1.6.1+dfsg-3",
"1.6.1+dfsg1-1",
"1.6.1+dfsg1-2",
"1.6.1+dfsg1-3",
"1.6.1+dfsg1-4",
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"database_specific": {
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{
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"purl": "pkg:deb/debian/python-mkdocs?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
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"1.6.1+dfsg1-5"
],
"database_specific": {
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{
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"package": {
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"purl": "pkg:deb/debian/python-mkdocs?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.6.1+dfsg1-2",
"1.6.1+dfsg1-3",
"1.6.1+dfsg1-4",
"1.6.1+dfsg1-5"
],
"database_specific": {
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},
"ecosystem_specific": {
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}
}
],
"modified": "2026-10-23T18:03:28.247795766Z",
"provider": "osv",
"upstream": [
"CVE-2021-40978"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2021-40978"
]
},
"related_cves": [
{
"value": "CVE-2021-40978",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 421606,
"published_at": "2021-10-07T14:15:08.28+00:00"
}