CWE-134
AllowedUse of Externally-Controlled Format String
Abstraction: Base · Status: Draft
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
501 vulnerabilities reference this CWE, most recent first.
GHSA-9F94-726P-5GMJ
Vulnerability from github – Published: 2025-10-03 21:30 – Updated: 2025-10-08 21:30A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to obtain secret data or modify memory.
We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
{
"affected": [],
"aliases": [
"CVE-2025-52429"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-03T19:15:45Z",
"severity": "MODERATE"
},
"details": "A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to obtain secret data or modify memory.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.6.3195 build 20250715 and later\nQuTS hero h5.2.6.3195 build 20250715 and later",
"id": "GHSA-9f94-726p-5gmj",
"modified": "2025-10-08T21:30:24Z",
"published": "2025-10-03T21:30:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52429"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-36"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-9GQ4-2485-Q63Q
Vulnerability from github – Published: 2026-07-15 15:33 – Updated: 2026-07-15 15:33A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.
{
"affected": [],
"aliases": [
"CVE-2026-15809"
],
"database_specific": {
"cwe_ids": [
"CWE-116",
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-15T13:17:03Z",
"severity": "HIGH"
},
"details": "A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.",
"id": "GHSA-9gq4-2485-q63q",
"modified": "2026-07-15T15:33:03Z",
"published": "2026-07-15T15:33:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15809"
},
{
"type": "WEB",
"url": "https://github.com/cri-o/cri-o/pull/6450"
},
{
"type": "WEB",
"url": "https://github.com/cri-o/cri-o/pull/6524"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-15809"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/cve-2022-4318"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500846"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-9GQ6-2MJQ-V47H
Vulnerability from github – Published: 2022-05-01 06:37 – Updated: 2022-05-01 06:37Multiple format string vulnerabilities in the auth_ldap_log_reason function in Apache auth_ldap 1.6.0 and earlier allows remote attackers to execute arbitrary code via various vectors, including the username.
{
"affected": [],
"aliases": [
"CVE-2006-0150"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2006-01-09T23:03:00Z",
"severity": "HIGH"
},
"details": "Multiple format string vulnerabilities in the auth_ldap_log_reason function in Apache auth_ldap 1.6.0 and earlier allows remote attackers to execute arbitrary code via various vectors, including the username.",
"id": "GHSA-9gq6-2mjq-v47h",
"modified": "2022-05-01T06:37:48Z",
"published": "2022-05-01T06:37:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2006-0150"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/24030"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/18382"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/18405"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/18412"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/18568"
},
{
"type": "WEB",
"url": "http://securitytracker.com/id?1015456"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2006/dsa-952"
},
{
"type": "WEB",
"url": "http://www.digitalarmaments.com/2006090173928420.html"
},
{
"type": "WEB",
"url": "http://www.redhat.com/support/errata/RHSA-2006-0179.html"
},
{
"type": "WEB",
"url": "http://www.rudedog.org/auth_ldap/Changes.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/421286/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/16177"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2006/0117"
},
{
"type": "WEB",
"url": "http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2006:017"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-9HXF-7MX9-M3J2
Vulnerability from github – Published: 2022-04-29 03:01 – Updated: 2022-04-29 03:01Format string vulnerability in the LogMsg function in sercd before 2.3.1 and sredird 2.2.1 and earlier allows remote attackers to execute arbitrary code via format string specifiers passed from the HandleCPCCommand function.
{
"affected": [],
"aliases": [
"CVE-2004-2386"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2004-12-31T05:00:00Z",
"severity": "HIGH"
},
"details": "Format string vulnerability in the LogMsg function in sercd before 2.3.1 and sredird 2.2.1 and earlier allows remote attackers to execute arbitrary code via format string specifiers passed from the HandleCPCCommand function.",
"id": "GHSA-9hxf-7mx9-m3j2",
"modified": "2022-04-29T03:01:21Z",
"published": "2022-04-29T03:01:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2004-2386"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/17056"
},
{
"type": "WEB",
"url": "http://cvs.lysator.liu.se/viewcvs/viewcvs.cgi/sercd/sercd.c?root=sercd"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/12351"
},
{
"type": "WEB",
"url": "http://securitytracker.com/id?1011038"
},
{
"type": "WEB",
"url": "http://www.osvdb.org/8375"
},
{
"type": "WEB",
"url": "http://www.osvdb.org/9104"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/11002"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/11031"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-9JQR-JFVV-CJ9J
Vulnerability from github – Published: 2024-06-25 12:30 – Updated: 2024-06-25 12:30OnCell G3470A-LTE Series firmware versions v1.7.7 and prior have been identified as vulnerable due to accepting a format string from an external source as an argument. An attacker could modify an externally controlled format string to cause a memory leak and denial of service.
{
"affected": [],
"aliases": [
"CVE-2024-4641"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-25T10:15:21Z",
"severity": "MODERATE"
},
"details": "OnCell G3470A-LTE Series firmware versions v1.7.7 and prior have been identified as vulnerable due to accepting a format string from an external source as an argument. An attacker could modify an externally controlled format string to cause a memory leak and denial of service.",
"id": "GHSA-9jqr-jfvv-cj9j",
"modified": "2024-06-25T12:30:55Z",
"published": "2024-06-25T12:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-4641"
},
{
"type": "WEB",
"url": "https://www.moxa.com/en/support/product-support/security-advisory/mpsa-242550-oncell-g3470a-lte-series-multiple-web-application-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-9JVR-742W-RWPH
Vulnerability from github – Published: 2026-04-22 09:31 – Updated: 2026-04-22 09:31A flaw was found in nano. A local user could exploit a format string vulnerability in the statusline() function. By creating a directory with a name containing printf specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the nano application.
{
"affected": [],
"aliases": [
"CVE-2026-6843"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-22T09:16:26Z",
"severity": "MODERATE"
},
"details": "A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.",
"id": "GHSA-9jvr-742w-rwph",
"modified": "2026-04-22T09:31:34Z",
"published": "2026-04-22T09:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6843"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-6843"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460017"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-9MW5-93P4-VPWG
Vulnerability from github – Published: 2022-05-01 18:31 – Updated: 2022-05-01 18:31Multiple format string vulnerabilities in the Monolith Lithtech engine, as used by First Encounter Assault Recon (F.E.A.R.) 1.08 and earlier, when Punkbuster (PB) is enabled, allow remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via format string specifiers in (1) a PB_Y packet to the YPG server on UDP port 27888 or (2) a PB_U packet to UCON on UDP port 27888, different vectors than CVE-2004-1500. NOTE: this issue might be in Punkbuster itself, but there are insufficient details to be certain.
{
"affected": [],
"aliases": [
"CVE-2007-5247"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2007-10-06T17:17:00Z",
"severity": "HIGH"
},
"details": "Multiple format string vulnerabilities in the Monolith Lithtech engine, as used by First Encounter Assault Recon (F.E.A.R.) 1.08 and earlier, when Punkbuster (PB) is enabled, allow remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via format string specifiers in (1) a PB_Y packet to the YPG server on UDP port 27888 or (2) a PB_U packet to UCON on UDP port 27888, different vectors than CVE-2004-1500. NOTE: this issue might be in Punkbuster itself, but there are insufficient details to be certain.",
"id": "GHSA-9mw5-93p4-vpwg",
"modified": "2022-05-01T18:31:29Z",
"published": "2022-05-01T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2007-5247"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/36900"
},
{
"type": "WEB",
"url": "http://aluigi.altervista.org/adv/fearfspb-adv.txt"
},
{
"type": "WEB",
"url": "http://aluigi.org/poc/fearfspb.zip"
},
{
"type": "WEB",
"url": "http://osvdb.org/45530"
},
{
"type": "WEB",
"url": "http://osvdb.org/45531"
},
{
"type": "WEB",
"url": "http://securityreason.com/securityalert/3197"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/481231/100/0/threaded"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-9V8G-Q8XX-7374
Vulnerability from github – Published: 2022-05-24 17:47 – Updated: 2024-04-04 03:06In the standard library in Rust before 1.50.3, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.
{
"affected": [],
"aliases": [
"CVE-2020-36323"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-14T07:15:00Z",
"severity": "HIGH"
},
"details": "In the standard library in Rust before 1.50.3, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.",
"id": "GHSA-9v8g-q8xx-7374",
"modified": "2024-04-04T03:06:10Z",
"published": "2022-05-24T17:47:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36323"
},
{
"type": "WEB",
"url": "https://github.com/rust-lang/rust/issues/80335"
},
{
"type": "WEB",
"url": "https://github.com/rust-lang/rust/pull/81728"
},
{
"type": "WEB",
"url": "https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174"
},
{
"type": "WEB",
"url": "https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-9VMF-4M6V-4CMV
Vulnerability from github – Published: 2025-10-07 15:30 – Updated: 2025-11-03 18:31A format string vulnerability exists in the formPingCmd functionality of Planet WGR-500 v1.3411b190912. A specially crafted series of HTTP requests can lead to memory corruption. An attacker can send a series of HTTP requests to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2025-48826"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-07T14:15:36Z",
"severity": "HIGH"
},
"details": "A format string vulnerability exists in the formPingCmd functionality of Planet WGR-500 v1.3411b190912. A specially crafted series of HTTP requests can lead to memory corruption. An attacker can send a series of HTTP requests to trigger this vulnerability.",
"id": "GHSA-9vmf-4m6v-4cmv",
"modified": "2025-11-03T18:31:45Z",
"published": "2025-10-07T15:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48826"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2228"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2228"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-9VQG-V7FX-9JVR
Vulnerability from github – Published: 2022-05-14 03:32 – Updated: 2022-05-14 03:32** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning.
{
"affected": [],
"aliases": [
"CVE-2018-7544"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-16T15:29:00Z",
"severity": "CRITICAL"
},
"details": "** DISPUTED ** A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning.",
"id": "GHSA-9vqg-v7fx-9jvr",
"modified": "2022-05-14T03:32:35Z",
"published": "2022-05-14T03:32:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7544"
},
{
"type": "WEB",
"url": "http://blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
Choose a language that is not subject to this flaw.
Mitigation
Ensure that all format string functions are passed a static string which cannot be controlled by the user, and that the proper number of arguments are always sent to that function as well. If at all possible, use functions that do not support the %n operator in format strings. [REF-116] [REF-117]
Mitigation
Run compilers and linkers with high warning levels, since they may detect incorrect usage.
CAPEC-135: Format String Injection
An adversary includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An adversary can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the adversary can write to the program stack.
CAPEC-67: String Format Overflow in syslog()
This attack targets applications and software that uses the syslog() function insecurely. If an application does not explicitely use a format string parameter in a call to syslog(), user input can be placed in the format string parameter leading to a format string injection attack. Adversaries can then inject malicious format string commands into the function call leading to a buffer overflow. There are many reported software vulnerabilities with the root cause being a misuse of the syslog() function.