DEBIAN-CVE-2026-75589
Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify. Each of the three compares the signature carried in the message against the locally computed one with the eq operator, which returns as soon as the two strings differ. The time taken to reject a signature varies with the length of the matching prefix. RSA-SHA1 is not affected, as it verifies through the RSA key object rather than by comparing strings. A client that can submit messages and time the replies may recover a valid signature one byte at a time rather than searching the whole signature space. Under PLAINTEXT the value compared against is the signature key itself, so the search recovers consumer_secret and token_secret.
DEBIAN-CVE-2026-75589
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-75589
libnet-oauth-perl
Source reference: /affected/0/package/name
- Affected versions
- 0.28-4
Source reference:
/affected/0/versions0.30-1Source reference:
/affected/0/versions0.31-1Source reference:
/affected/0/versions0.31-2Source reference:
/affected/0/versions0.32-1Source reference:
/affected/0/versions0.33-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libnet-oauth-perl
Source reference: /affected/1/package/name
- Affected versions
- 0.31-1
Source reference:
/affected/1/versions0.31-2Source reference:
/affected/1/versions0.32-1Source reference:
/affected/1/versions0.33-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libnet-oauth-perl
Source reference: /affected/2/package/name
- Affected versions
- 0.31-1
Source reference:
/affected/2/versions0.31-2Source reference:
/affected/2/versions0.32-1Source reference:
/affected/2/versions - Fixed versions
- 0.33-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-oauth-perl",
"purl": "pkg:deb/debian/libnet-oauth-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.28-4",
"0.30-1",
"0.31-1",
"0.31-2",
"0.32-1",
"0.33-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75589.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-oauth-perl",
"purl": "pkg:deb/debian/libnet-oauth-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.31-1",
"0.31-2",
"0.32-1",
"0.33-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75589.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.33-1"
}
]
}
],
"package": {
"name": "libnet-oauth-perl",
"purl": "pkg:deb/debian/libnet-oauth-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.31-1",
"0.31-2",
"0.32-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75589.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58469 · Revision 1
- Added to Heist Feed
- Publisher date