ubuntu-cve-2026-48979
Vulnerability from osv_ubuntu
Published
2026-06-17 21:16
Modified
2026-06-24 09:03
Summary
Details
PHP Standard Library (PSL) is set of APIs covering async, collections, networking, I/O, cryptography, terminal UI, etc. In versions 6.1.0, 6.1.1 and 6.2.0, the Psl\H2\ServerConnection does not validate that the total bytes received in DATA frames match the content-length header declared in the HEADERS frame, allowing request smuggling. This is in violation of RFC 9113 §8.1.1. A malicious client is able to send more DATA bytes than declared, smuggling additional content past application-level size limits and send fewer DATA bytes than declared and close the stream early, causing applications that trust the declared length to behave incorrectly. The vulnerability is only reachable for consumers using Psl\H2\ServerConnection directly to accept untrusted client traffic. Consumers of documented high-level PSL APIs are not affected. This issue has been fixed in versions 6.1.2 and 6.2.1.
Severity
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
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"binary_version": "8.4.11-1ubuntu1.2"
},
{
"binary_name": "php8.4-zip",
"binary_version": "8.4.11-1ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "php8.4",
"purl": "pkg:deb/ubuntu/php8.4@8.4.11-1ubuntu1.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.4.5-1ubuntu1",
"8.4.8-1ubuntu1",
"8.4.11-1ubuntu1",
"8.4.11-1ubuntu1.1",
"8.4.11-1ubuntu1.2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libapache2-mod-php8.5",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "libphp8.5-embed",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-bcmath",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-bz2",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-cgi",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-cli",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-common",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-curl",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-dba",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-enchant",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-fpm",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-gd",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-gmp",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-interbase",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-intl",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-ldap",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-litespeed",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-mbstring",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-mysql",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-odbc",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-pgsql",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-phpdbg",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-readline",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-snmp",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-soap",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-sqlite3",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-sybase",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-tidy",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-xml",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-xsl",
"binary_version": "8.5.4-0ubuntu1.1"
},
{
"binary_name": "php8.5-zip",
"binary_version": "8.5.4-0ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "php8.5",
"purl": "pkg:deb/ubuntu/php8.5@8.5.4-0ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.5.2-0ubuntu1",
"8.5.4-0ubuntu1",
"8.5.4-0ubuntu1.1"
]
}
],
"aliases": [],
"details": "PHP Standard Library (PSL) is set of APIs covering async, collections, networking, I/O, cryptography, terminal UI, etc. In versions 6.1.0, 6.1.1 and 6.2.0, the Psl\\H2\\ServerConnection does not validate that the total bytes received in DATA frames match the content-length header declared in the HEADERS frame, allowing request smuggling. This is in violation of RFC 9113 \u00a78.1.1. A malicious client is able to send more DATA bytes than declared, smuggling additional content past application-level size limits and send fewer DATA bytes than declared and close the stream early, causing applications that trust the declared length to behave incorrectly. The vulnerability is only reachable for consumers using Psl\\H2\\ServerConnection directly to accept untrusted client traffic. Consumers of documented high-level PSL APIs are not affected. This issue has been fixed in versions 6.1.2 and 6.2.1.",
"id": "UBUNTU-CVE-2026-48979",
"modified": "2026-06-24T09:03:09Z",
"published": "2026-06-17T21:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-48979"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-48979"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-48979"
],
"withdrawn": "2026-07-03T12:49:51Z"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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