High
llama.cpp — security advisory
llama.cpp through commit 97f06e9, when started with the --reranking flag, allows remote attackers to cause a denial of service (std::bad_alloc and HTTP 500) via a negative top_n value in a POST request to /rerank.
- Products
- llama.cpp
- Affected versions
- 10438+dfsg-1, 10438+dfsg-1ubuntu1, 5882+dfsg-2, 8064+dfsg-1ubuntu1, 8681+dfsg-1, 9721+dfsg-1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-52132
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:28 UTC · Revision 1
Source evidence
llama.cpp through commit 97f06e9, when started with the --reranking flag, allows remote attackers to cause a denial of service (std::bad_alloc and HTTP 500) via a negative top_n value in a POST request to /rerank.
osv:UBUNTU-CVE-2026-52132
llama.cpp
Fixed versions: Not specified
llama.cpp
Fixed versions: Not specified
Complete source record
{
"id": "bfff2c6cd54629ccc76821109af47a0194658a19a8881afec08d29f1e5ecb745",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-52132",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-52132",
"summary": "llama.cpp through commit 97f06e9, when started with the --reranking flag, allows remote attackers to cause a denial of service (std::bad_alloc and HTTP 500) via a negative top_n value in a POST request to /rerank.",
"evidence": "osv:UBUNTU-CVE-2026-52132",
"products": [
{
"name": {
"value": "llama.cpp",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8681+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9721+dfsg-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "10438+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "10438+dfsg-1ubuntu1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "llama.cpp",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5882+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "8064+dfsg-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "8681+dfsg-1",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-52132",
"aliases": [
"UBUNTU-CVE-2026-52132"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "llama.cpp",
"purl": "pkg:deb/ubuntu/llama.cpp?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"8681+dfsg-1",
"9721+dfsg-1ubuntu1",
"10438+dfsg-1",
"10438+dfsg-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-52132.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libllama0",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp-examples",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp-services",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp-tests",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp-tools",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "llama.cpp-tools-extra",
"binary_version": "10438+dfsg-1ubuntu1"
},
{
"binary_name": "python3-gguf",
"binary_version": "10438+dfsg-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "llama.cpp",
"purl": "pkg:deb/ubuntu/llama.cpp?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5882+dfsg-2",
"8064+dfsg-1ubuntu1",
"8681+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-52132.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libllama0",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-examples",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tests",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tools",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "llama.cpp-tools-extra",
"binary_version": "8681+dfsg-1"
},
{
"binary_name": "python3-gguf",
"binary_version": "8681+dfsg-1"
}
]
}
}
],
"modified": "2026-10-17T12:58:34.276513356Z",
"provider": "osv",
"upstream": [
"CVE-2026-52132"
],
"references": [
"https://ubuntu.com/security/CVE-2026-52132",
"https://www.cve.org/CVERecord?id=CVE-2026-52132"
]
},
"related_cves": [
{
"value": "CVE-2026-52132",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358799,
"published_at": "2026-09-01T18:17:00+00:00"
}