CVE-2024-27355: Phpseclib/phpseclib Phpseclib Guardrails Needed On OID Vulnerability
HIGHCVE-2024-27355 is a HIGH (CVSS 7.5) phpseclib guardrails needed on oid vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Phpseclib/phpseclib libraries in the Packagist ecosystem. The issue involves phpseclib guardrails needed on oid length. Remediation is available by upgrading affected packages to version 2.0.47, 3.0.36, 1.0.23.
CVE-2024-27355 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2024-27355
To remediate this vulnerability, upgrade all affected Phpseclib/phpseclib dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade phpseclib/phpseclib to 2.0.47Upgrade phpseclib/phpseclib to 3.0.36Upgrade phpseclib/phpseclib to 1.0.23Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for phpseclib/phpseclibHow to Check if You Are Affected
To determine whether your application is affected by CVE-2024-27355, inspect your project dependencies for Phpseclib/phpseclib:
inspect dependencies for phpseclib/phpseclibAnalyze the terminal output to locate any version of Phpseclib/phpseclib in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.47), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Phpseclib/phpseclib, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2024-27355 Affected Phpseclib/phpseclib Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
phpseclib/phpseclib
|
Packagist |
≥ 2.0.0
< 2.0.47
|
2.0.47
|
|
phpseclib/phpseclib
|
Packagist |
≥ 3.0.0
< 3.0.36
|
3.0.36
|
|
phpseclib/phpseclib
|
Packagist |
≥ 0.1.1
< 1.0.23
|
1.0.23
|
References
Frequently Asked Questions
What is CVE-2024-27355?
Which Phpseclib/phpseclib versions are affected?
What version fixes CVE-2024-27355?
Is phpseclib/phpseclib affected?
What is the CVSS score of CVE-2024-27355?
What CWE is associated with CVE-2024-27355?
How can I check Packagist dependencies for CVE-2024-27355?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-f2qx-66wf-wvvx",
"modified" : "2026-05-08T18:24:30Z",
"published" : "2026-05-08T18:24:30Z",
"aliases" : [ "CVE-2024-27355" ],
"summary" : "phpseclib guardrails needed on OID length",
"details" : "### Impact\nAny application using that loads untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc).\n\n### Patches\nhttps://github.com/phpseclib/phpseclib/commit/e32531001b4d62c66c3d824ccef54ffad835eb59\n\n### Workarounds\nNo.\n\n### Resources\nhttps://github.com/phpseclib/phpseclib/commit/e32531001b4d62c66c3d824ccef54ffad835eb59\nhttps://www.usenix.org/system/files/conference/usenixsecurity25/sec25cycle1-prepub-599-shi-bing.pdf",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "phpseclib/phpseclib"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.0"
}, {
"fixed" : "2.0.47"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.0.46"
}
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "phpseclib/phpseclib"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0.0"
}, {
"fixed" : "3.0.36"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 3.0.35"
}
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "phpseclib/phpseclib"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0.1.1"
}, {
"fixed" : "1.0.23"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 1.0.22"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/phpseclib/phpseclib/security/advisories/GHSA-f2qx-66wf-wvvx"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-27355"
}, {
"type" : "WEB",
"url" : "https://github.com/phpseclib/phpseclib/commit/e32531001b4d62c66c3d824ccef54ffad835eb59"
}, {
"type" : "WEB",
"url" : "https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27355.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/phpseclib/phpseclib"
}, {
"type" : "WEB",
"url" : "https://github.com/phpseclib/phpseclib/blob/978d081fe50ff92879c50ff143c62a143edb0117/phpseclib/File/ASN1.php#L1129"
}, {
"type" : "WEB",
"url" : "https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html"
}, {
"type" : "WEB",
"url" : "https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-400" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-05-08T18:24:30Z",
"nvd_published_at" : null
}
}