Search criteria
3 vulnerabilities by vstakhov
CVE-2026-0708 (GCVE-0-2026-0708)
Vulnerability from cvelistv5 – Published: 2026-03-17 02:28 – Updated: 2026-03-17 13:26
VLAI
Title
Libucl: libucl: denial of service via embedded null byte in ucl input
Summary
A flaw was found in libucl. A remote attacker could exploit this by providing a specially crafted Universal Configuration Language (UCL) input that contains a key with an embedded null byte. This can cause a segmentation fault (SEGV fault) in the `ucl_object_emit` function when parsing and emitting the object, leading to a Denial of Service (DoS) for the affected system.
Severity
8.3 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-0708 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2427770 | issue-trackingx_refsource_REDHAT |
| https://github.com/vstakhov/libucl/issues/323 |
Impacted products
Date Public
2025-05-15 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-0708",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-17T13:26:43.148913Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-17T13:26:47.057Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/vstakhov/libucl/issues/323"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/vstakhov/libucl",
"defaultStatus": "unknown",
"packageName": "libucl",
"product": "libucl",
"vendor": "libucl",
"versions": [
{
"status": "affected",
"version": "3e7f023e184e06f30fb5792dacd9dd0f8b692f1b",
"versionType": "git"
}
]
}
],
"datePublic": "2025-05-15T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in libucl. A remote attacker could exploit this by providing a specially crafted Universal Configuration Language (UCL) input that contains a key with an embedded null byte. This can cause a segmentation fault (SEGV fault) in the `ucl_object_emit` function when parsing and emitting the object, leading to a Denial of Service (DoS) for the affected system."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-17T11:38:51.414Z",
"orgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
"shortName": "fedora"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-0708"
},
{
"name": "RHBZ#2427770",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427770"
},
{
"url": "https://github.com/vstakhov/libucl/issues/323"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-01-08T03:30:46.275Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2025-05-15T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Libucl: libucl: denial of service via embedded null byte in ucl input",
"workarounds": [
{
"lang": "en",
"value": "To mitigate this issue, applications utilizing `libucl` should avoid processing untrusted input that contains keys with embedded null bytes, especially when operating in `UCL_PARSER_ZEROCOPY` mode. Restricting input to trusted sources can reduce exposure."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-125: Out-of-bounds Read"
}
},
"cveMetadata": {
"assignerOrgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
"assignerShortName": "fedora",
"cveId": "CVE-2026-0708",
"datePublished": "2026-03-17T02:28:08.429Z",
"dateReserved": "2026-01-08T03:31:35.226Z",
"dateUpdated": "2026-03-17T13:26:47.057Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-11010 (GCVE-0-2025-11010)
Vulnerability from cvelistv5 – Published: 2025-09-26 11:02 – Updated: 2025-09-26 12:18
VLAI
Title
vstakhov libucl ucl_util.c ucl_include_common heap-based overflow
Summary
A vulnerability has been found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_include_common of the file /src/ucl_util.c. Such manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.325953 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.325953 | signaturepermissions-required |
| https://vuldb.com/?submit.654068 | third-party-advisory |
| https://github.com/vstakhov/libucl/issues/337 | issue-tracking |
| https://github.com/user-attachments/files/2231765… | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-11010",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-26T12:13:46.077071Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-26T12:18:04.703Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libucl",
"vendor": "vstakhov",
"versions": [
{
"status": "affected",
"version": "0.9.0"
},
{
"status": "affected",
"version": "0.9.1"
},
{
"status": "affected",
"version": "0.9.2"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ahuo (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_include_common of the file /src/ucl_util.c. Such manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used."
},
{
"lang": "de",
"value": "Es wurde eine Schwachstelle in vstakhov libucl up to 0.9.2 entdeckt. Betroffen hiervon ist die Funktion ucl_include_common der Datei /src/ucl_util.c. Mittels dem Manipulieren mit unbekannten Daten kann eine heap-based buffer overflow-Schwachstelle ausgenutzt werden. Der Angriff muss auf lokaler Ebene erfolgen. Der Exploit ist \u00f6ffentlich verf\u00fcgbar und k\u00f6nnte genutzt werden."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 4.3,
"vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Heap-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-26T11:02:06.635Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-325953 | vstakhov libucl ucl_util.c ucl_include_common heap-based overflow",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.325953"
},
{
"name": "VDB-325953 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.325953"
},
{
"name": "Submit #654068 | vstakhov libucl 0.9.2 / master commit d8af953 Heap-based Buffer Overflow",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.654068"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/vstakhov/libucl/issues/337"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/user-attachments/files/22317650/poc.zip"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-26T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-26T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-26T08:20:19.000Z",
"value": "VulDB entry last update"
}
],
"title": "vstakhov libucl ucl_util.c ucl_include_common heap-based overflow"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-11010",
"datePublished": "2025-09-26T11:02:06.635Z",
"dateReserved": "2025-09-26T06:15:03.811Z",
"dateUpdated": "2025-09-26T12:18:04.703Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2025-6499 (GCVE-0-2025-6499)
Vulnerability from cvelistv5 – Published: 2025-06-23 02:00 – Updated: 2025-06-23 13:29
VLAI
Title
vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflow
Summary
A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_parse_multiline_string of the file src/ucl_parser.c. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.313615 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.313615 | signaturepermissions-required |
| https://vuldb.com/?submit.601011 | third-party-advisory |
| https://github.com/vstakhov/libucl/issues/319 | issue-tracking |
| https://github.com/user-attachments/files/1982539… | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-6499",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-06-23T13:29:26.919846Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-06-23T13:29:29.523Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/vstakhov/libucl/issues/319"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libucl",
"vendor": "vstakhov",
"versions": [
{
"status": "affected",
"version": "0.9.0"
},
{
"status": "affected",
"version": "0.9.1"
},
{
"status": "affected",
"version": "0.9.2"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "JJLeo (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_parse_multiline_string of the file src/ucl_parser.c. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used."
},
{
"lang": "de",
"value": "In vstakhov libucl bis 0.9.2 wurde eine problematische Schwachstelle entdeckt. Es geht um die Funktion ucl_parse_multiline_string der Datei src/ucl_parser.c. Mittels dem Manipulieren mit unbekannten Daten kann eine heap-based buffer overflow-Schwachstelle ausgenutzt werden. Der Angriff muss lokal angegangen werden. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 1.7,
"vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Heap-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-06-23T02:00:08.771Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-313615 | vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflow",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.313615"
},
{
"name": "VDB-313615 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.313615"
},
{
"name": "Submit #601011 | vstakhov libucl libucl 0.9.2 (commit 3e7f023) Heap-based Buffer Overflow",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.601011"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/vstakhov/libucl/issues/319"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/user-attachments/files/19825399/libucl_crash.txt"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-06-22T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-06-22T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-06-22T21:11:35.000Z",
"value": "VulDB entry last update"
}
],
"title": "vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflow"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-6499",
"datePublished": "2025-06-23T02:00:08.771Z",
"dateReserved": "2025-06-22T19:06:31.978Z",
"dateUpdated": "2025-06-23T13:29:29.523Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}