GHSA-5X78-73V4-XG6W
Vulnerability from github – Published: 2026-08-24 19:43 – Updated: 2026-08-24 19:43A malicious, compromised, or man-in-the-middle server can supply an arbitrarily
large SCRAM-SHA-256 PBKDF2 iteration count during authentication. The client
runs it inline with no upper bound, pinning a tokio worker thread for minutes
per connection, possibly stalling the whole async runtime.
Applications that connect only to a trusted database are not exposed; the risk applies to clients that may connect to untrusted or user-supplied servers, or whose connection can be intercepted by a man-in-the-middle.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "postgres-protocol"
},
"ranges": [
{
"events": [
{
"introduced": "0.3.0"
},
{
"fixed": "0.6.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2026-08-24T19:43:31Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "A malicious, compromised, or man-in-the-middle server can supply an arbitrarily\nlarge SCRAM-SHA-256 PBKDF2 iteration count during authentication. The client\nruns it inline with no upper bound, pinning a `tokio` worker thread for minutes\nper connection, possibly stalling the whole async runtime.\n\nApplications that connect only to a trusted database are not exposed; the risk\napplies to clients that may connect to untrusted or user-supplied servers, or\nwhose connection can be intercepted by a man-in-the-middle.",
"id": "GHSA-5x78-73v4-xg6w",
"modified": "2026-08-24T19:43:32Z",
"published": "2026-08-24T19:43:31Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rust-postgres/rust-postgres/commit/d40097a36a85068ea50a3afbf0ce154ba439e7f0"
},
{
"type": "PACKAGE",
"url": "https://github.com/rust-postgres/rust-postgres"
},
{
"type": "WEB",
"url": "https://github.com/rust-postgres/rust-postgres/releases/tag/postgres-protocol-v0.6.12"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2026-0179.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "postgres-protocol: Unbounded SCRAM iteration count allows a malicious server to cause CPU-exhaustion denial of service"
}
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