USN-8931-1 (UBUNTU-CVE-2026-58415)
Vulnerability from osv_ubuntu – Published: 2026-10-14 18:21 – Updated: 2026-10-14 18:21 – Source website
VLAI
Summary
apache2 vulnerabilities
Details
이지웅 discovered that Apache HTTP Server exposed WebDAV property information. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-58415)
Zhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not properly validate FTP server responses. A remote attacker could possibly use this issue to make a forward proxy connect to an arbitrary host. (CVE-2026-63045)
Hyojae Lee and Zhen Kong discovered that Apache HTTP Server incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-63292)
Lucian Nitescu and Zhen Kong discovered that Apache HTTP Server did not properly handle certain responses from backend servers. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-63686)
Qing Xu discovered that Apache HTTP Server incorrectly interpreted HTTP responses from backend servers. A remote attacker could possibly use this issue to perform HTTP response smuggling attacks. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-63718)
Hyojae Lee discovered that Apache HTTP Server did not properly validate Digest authentication requests. A machine-in-the-middle attacker could possibly use this issue to bypass authentication. (CVE-2026-73636)
Zhen Kong and Darren Carreras discovered that Apache HTTP Server did not properly manage authentication requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-73637)
Vlatko Kosturjak discovered that Apache HTTP Server did not properly enforce access restrictions for user directories. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-79768)
Zhen Kong discovered that Apache HTTP Server did not properly handle certain WebDAV requests. An authenticated user could possibly use this issue to cause a denial of service or corrupt WebDAV property data. (CVE-2026-93546)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-58415",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
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]
},
{
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{
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{
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}
]
},
{
"id": "CVE-2026-63292",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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{
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{
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]
},
{
"id": "CVE-2026-73636",
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{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-73637",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
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"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-79768",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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{
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{
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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]
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},
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]
},
{
"id": "CVE-2026-63686",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
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"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-73636",
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"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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{
"id": "CVE-2026-73637",
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{
"id": "CVE-2026-79768",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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{
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"cves_map": {
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"id": "CVE-2026-58415",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-63045",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
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{
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"type": "Ubuntu"
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]
},
{
"id": "CVE-2026-63292",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"score": "medium",
"type": "Ubuntu"
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]
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{
"id": "CVE-2026-63686",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
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"id": "CVE-2026-73636",
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"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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},
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"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-73637",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-79768",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
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"score": "medium",
"type": "Ubuntu"
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]
},
{
"id": "CVE-2026-93546",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
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"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
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"id": "CVE-2026-58415",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-63045",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-63292",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-63686",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-63718",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-73636",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-73637",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
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"type": "CVSS_V3"
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"score": "medium",
"type": "Ubuntu"
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]
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{
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"type": "CVSS_V3"
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"type": "Ubuntu"
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"type": "CVSS_V3"
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{
"score": "medium",
"type": "Ubuntu"
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{
"id": "CVE-2026-79768",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
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{
"score": "medium",
"type": "Ubuntu"
}
]
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{
"id": "CVE-2026-93546",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
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"type": "Ubuntu"
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"aliases": [],
"details": "\uc774\uc9c0\uc6c5 discovered that Apache HTTP Server exposed WebDAV property information.\nA remote attacker could possibly use this issue to obtain sensitive\ninformation. (CVE-2026-58415)\n\nZhen Kong and Charles Vosburgh discovered that Apache HTTP Server did not\nproperly validate FTP server responses. A remote attacker could possibly\nuse this issue to make a forward proxy connect to an arbitrary host.\n(CVE-2026-63045)\n\nHyojae Lee and Zhen Kong discovered that Apache HTTP Server incorrectly\nhandled certain HTTP requests. A remote attacker could possibly use this\nissue to cause a denial of service or execute arbitrary code.\n(CVE-2026-63292)\n\nLucian Nitescu and Zhen Kong discovered that Apache HTTP Server did not\nproperly handle certain responses from backend servers. A remote attacker\ncould possibly use this issue to cause a denial of service.\n(CVE-2026-63686)\n\nQing Xu discovered that Apache HTTP Server incorrectly interpreted HTTP\nresponses from backend servers. A remote attacker could possibly use this\nissue to perform HTTP response smuggling attacks. This issue only affected\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-63718)\n\nHyojae Lee discovered that Apache HTTP Server did not properly validate\nDigest authentication requests. A machine-in-the-middle attacker could\npossibly use this issue to bypass authentication. (CVE-2026-73636)\n\nZhen Kong and Darren Carreras discovered that Apache HTTP Server did not\nproperly manage authentication requests. A remote attacker could possibly\nuse this issue to cause a denial of service. (CVE-2026-73637)\n\nVlatko Kosturjak discovered that Apache HTTP Server did not properly\nenforce access restrictions for user directories. A remote attacker could\npossibly use this issue to obtain sensitive information. (CVE-2026-79768)\n\nZhen Kong discovered that Apache HTTP Server did not properly handle\ncertain WebDAV requests. An authenticated user could possibly use this\nissue to cause a denial of service or corrupt WebDAV property data.\n(CVE-2026-93546)",
"id": "USN-8931-1",
"modified": "2026-10-14T18:21:58Z",
"published": "2026-10-14T18:21:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8931-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58415"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-63045"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-63292"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-63686"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-63718"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-73636"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-73637"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-79768"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-93546"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "apache2 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-58415",
"UBUNTU-CVE-2026-63045",
"UBUNTU-CVE-2026-63292",
"UBUNTU-CVE-2026-63686",
"UBUNTU-CVE-2026-63718",
"UBUNTU-CVE-2026-73636",
"UBUNTU-CVE-2026-73637",
"UBUNTU-CVE-2026-79768",
"UBUNTU-CVE-2026-93546"
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.