OESA-2026-3976 (CVE-2026-16615)
Vulnerability from osv_openeuler – Published: 2026-09-20 13:23 – Updated: 2026-09-20 13:23 – Source websiteThis library has been designed to make it easier to access web services that claim to be "RESTful". It comprises of two parts: the first aims to make it easier to make requests by providing a wrapper around libsoup, the second aids with XML parsing by wrapping libxml2.
Security Fix(es):
A flaw was found in librest. The PKCE implementation for OAuth authorization uses the GRand function from the GLib API, a cryptographically insecure pseudo-random number generator. Because the generated "code verifier" lacks sufficient cryptographic entropy, a malicious actor can reverse-engineer the pseudo-random number generator (PRNG) seed to predict or reconstruct the code verifier string, allowing an attacker to bypass PKCE protections and successfully impersonate the client during the OAuth 2.0 authorization flow.(CVE-2026-16615)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"rest-0.9.1-6.oe2403sp4.aarch64.rpm",
"rest-debuginfo-0.9.1-6.oe2403sp4.aarch64.rpm",
"rest-debugsource-0.9.1-6.oe2403sp4.aarch64.rpm",
"rest-demo-0.9.1-6.oe2403sp4.aarch64.rpm",
"rest-devel-0.9.1-6.oe2403sp4.aarch64.rpm"
],
"noarch": [
"rest-help-0.9.1-6.oe2403sp4.noarch.rpm"
],
"src": [
"rest-0.9.1-6.oe2403sp4.src.rpm"
],
"x86_64": [
"rest-0.9.1-6.oe2403sp4.x86_64.rpm",
"rest-debuginfo-0.9.1-6.oe2403sp4.x86_64.rpm",
"rest-debugsource-0.9.1-6.oe2403sp4.x86_64.rpm",
"rest-demo-0.9.1-6.oe2403sp4.x86_64.rpm",
"rest-devel-0.9.1-6.oe2403sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP4",
"name": "rest",
"purl": "pkg:rpm/openEuler/rest\u0026distro=openEuler-24.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.1-6.oe2403sp4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "Medium"
},
"details": "This library has been designed to make it easier to access web services that claim to be \u0026amp;quot;RESTful\u0026amp;quot;. It comprises of two parts: the first aims to make it easier to make requests by providing a wrapper around libsoup, the second aids with XML parsing by wrapping libxml2.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in librest. The PKCE implementation for OAuth authorization uses the GRand function from the GLib API, a cryptographically insecure pseudo-random number generator. Because the generated \u0026quot;code verifier\u0026quot; lacks sufficient cryptographic entropy, a malicious actor can reverse-engineer the pseudo-random number generator (PRNG) seed to predict or reconstruct the code verifier string, allowing an attacker to bypass PKCE protections and successfully impersonate the client during the OAuth 2.0 authorization flow.(CVE-2026-16615)",
"id": "OESA-2026-3976",
"modified": "2026-09-20T13:23:44Z",
"published": "2026-09-20T13:23:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3976"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16615"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "rest security update",
"upstream": [
"CVE-2026-16615"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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