High
aflplusplus — security advisory
In AFL++ 4.05c, the CmpLog component uses the current working directory to resolve and execute unprefixed fuzzing targets, allowing code execution.
- Products
- aflplusplus
- Affected versions
- 2.53c-1, 2.60c-1, 2.60c-1build1, 2.60c-1build2, 2.68c-1build1, 3.14c-2ubuntu1, 4.00c-1ubuntu1, 4.08c-1ubuntu2, 4.08c-1ubuntu3, 4.09c-1ubuntu1, 4.09c-1ubuntu2, 4.09c-1ubuntu3, 4.21c-4ubuntu2, 4.33c-1.1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-26266
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:49 UTC · Revision 1
Source evidence
In AFL++ 4.05c, the CmpLog component uses the current working directory to resolve and execute unprefixed fuzzing targets, allowing code execution.
osv:UBUNTU-CVE-2023-26266
aflplusplus
Fixed versions: Not specified
aflplusplus
Fixed versions: Not specified
aflplusplus
Fixed versions: Not specified
aflplusplus
Fixed versions: Not specified
aflplusplus
Fixed versions: Not specified
aflplusplus
Fixed versions: Not specified
Complete source record
{
"id": "7bb49dcc31ad1597c6be7d554e632da2f939069012ff5b164806577ac1f8944b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-26266",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-26266",
"summary": "In AFL++ 4.05c, the CmpLog component uses the current working directory to resolve and execute unprefixed fuzzing targets, allowing code execution.",
"evidence": "osv:UBUNTU-CVE-2023-26266",
"products": [
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.53c-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.60c-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.60c-1build1",
"evidence": "/affected/0/versions"
},
{
"value": "2.60c-1build2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.68c-1build1",
"evidence": "/affected/1/versions"
},
{
"value": "3.14c-2ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "4.00c-1ubuntu1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.08c-1ubuntu2",
"evidence": "/affected/2/versions"
},
{
"value": "4.08c-1ubuntu3",
"evidence": "/affected/2/versions"
},
{
"value": "4.09c-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "4.09c-1ubuntu2",
"evidence": "/affected/2/versions"
},
{
"value": "4.09c-1ubuntu3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.21c-4ubuntu2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.33c-1.1ubuntu1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "aflplusplus",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.21c-4ubuntu2",
"evidence": "/affected/5/versions"
},
{
"value": "4.33c-1.1ubuntu1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2023-26266",
"aliases": [
"UBUNTU-CVE-2023-26266"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.53c-1",
"2.60c-1",
"2.60c-1build1",
"2.60c-1build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl++",
"binary_version": "2.60c-1build2"
},
{
"binary_name": "afl++-clang",
"binary_version": "2.60c-1build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.68c-1build1",
"3.14c-2ubuntu1",
"4.00c-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl",
"binary_version": "4.00c-1ubuntu1"
},
{
"binary_name": "afl++",
"binary_version": "4.00c-1ubuntu1"
},
{
"binary_name": "afl++-clang",
"binary_version": "4.00c-1ubuntu1"
},
{
"binary_name": "afl-clang",
"binary_version": "4.00c-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"4.08c-1ubuntu2",
"4.08c-1ubuntu3",
"4.09c-1ubuntu1",
"4.09c-1ubuntu2",
"4.09c-1ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl++",
"binary_version": "4.09c-1ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"4.21c-4ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl++",
"binary_version": "4.21c-4ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.33c-1.1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl++",
"binary_version": "4.33c-1.1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aflplusplus",
"purl": "pkg:deb/ubuntu/aflplusplus?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.21c-4ubuntu2",
"4.33c-1.1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-26266.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "afl++",
"binary_version": "4.33c-1.1ubuntu1"
}
]
}
}
],
"modified": "2026-10-17T12:56:04.758834797Z",
"provider": "osv",
"upstream": [
"CVE-2023-26266"
],
"references": [
"https://ubuntu.com/security/CVE-2023-26266",
"https://github.com/AFLplusplus/AFLplusplus/pull/1643",
"https://github.com/AFLplusplus/AFLplusplus/commit/f2be73186e2e16c3992f92b65ae9ba598d6fff2f",
"https://github.com/AFLplusplus/AFLplusplus/commit/673a0a3866783bf28e31d14fbd7a9009c7816ec3",
"https://www.cve.org/CVERecord?id=CVE-2023-26266"
]
},
"related_cves": [
{
"value": "CVE-2023-26266",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354781,
"published_at": "2023-02-21T04:15:00+00:00"
}