DEBIAN-CVE-2026-72889
Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify. verify resolves the signature method class from the signature_method parameter of the incoming message. signature_method is required on every request, so the algorithm used to check a signature is chosen by whoever sent it, and nothing lets the verifying party pin the method instead. When a message names HMAC-SHA1 or HMAC-SHA256, the key is derived from consumer_secret and token_secret rather than from the key the provider deployed. A provider deployed on RSA-SHA1 holds only the consumer public key, and RFC 5849 does not use consumer_secret for that method, so the required parameter is filled with a placeholder. A client that names HMAC-SHA1 instead has its signature checked against that placeholder, so a guessable one is enough to forge requests for any consumer key and token.
DEBIAN-CVE-2026-72889
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-2026-72889
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-2026-72889.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-2026-72889.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-2026-72889.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58315 · Revision 1
- Added to Heist Feed
- Publisher date