DEBIAN-CVE-2026-49852
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8.
DEBIAN-CVE-2026-49852
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-2026-49852
joserfc
Source reference: /affected/0/package/name
- Affected versions
- 1.1.0-1
Source reference:
/affected/0/versions1.2.0-1Source reference:
/affected/0/versions1.2.2-1Source reference:
/affected/0/versions1.3.1-1Source reference:
/affected/0/versions1.3.2-1Source reference:
/affected/0/versions1.3.4-1Source reference:
/affected/0/versions1.4.0-1Source reference:
/affected/0/versions1.4.1-1Source reference:
/affected/0/versions1.4.3-1Source reference:
/affected/0/versions1.5.0-1Source reference:
/affected/0/versions1.6.0-1Source reference:
/affected/0/versions1.6.1-1Source reference:
/affected/0/versions1.6.2-1Source reference:
/affected/0/versions1.6.3-1Source reference:
/affected/0/versions1.6.4-1Source reference:
/affected/0/versions1.6.5-1Source reference:
/affected/0/versions1.6.8-1Source reference:
/affected/0/versions1.7.0-1Source reference:
/affected/0/versions1.7.1-1Source reference:
/affected/0/versions1.7.2-1Source reference:
/affected/0/versions1.7.3-1Source reference:
/affected/0/versions1.7.4-1Source reference:
/affected/0/versions1.7.5-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
joserfc
Source reference: /affected/1/package/name
- Affected versions
- 1.1.0-1
Source reference:
/affected/1/versions1.2.0-1Source reference:
/affected/1/versions1.2.2-1Source reference:
/affected/1/versions1.3.1-1Source reference:
/affected/1/versions1.3.2-1Source reference:
/affected/1/versions1.3.4-1Source reference:
/affected/1/versions1.4.0-1Source reference:
/affected/1/versions1.4.1-1Source reference:
/affected/1/versions1.4.3-1Source reference:
/affected/1/versions1.5.0-1Source reference:
/affected/1/versions1.6.0-1Source reference:
/affected/1/versions1.6.1-1Source reference:
/affected/1/versions1.6.2-1Source reference:
/affected/1/versions1.6.3-1Source reference:
/affected/1/versions1.6.4-1Source reference:
/affected/1/versions1.6.5-1Source reference:
/affected/1/versions - Fixed versions
- 1.6.8-1
Source reference:
/affected/1/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": "joserfc",
"purl": "pkg:deb/debian/joserfc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.1.0-1",
"1.2.0-1",
"1.2.2-1",
"1.3.1-1",
"1.3.2-1",
"1.3.4-1",
"1.4.0-1",
"1.4.1-1",
"1.4.3-1",
"1.5.0-1",
"1.6.0-1",
"1.6.1-1",
"1.6.2-1",
"1.6.3-1",
"1.6.4-1",
"1.6.5-1",
"1.6.8-1",
"1.7.0-1",
"1.7.1-1",
"1.7.2-1",
"1.7.3-1",
"1.7.4-1",
"1.7.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49852.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.8-1"
}
]
}
],
"package": {
"name": "joserfc",
"purl": "pkg:deb/debian/joserfc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.1.0-1",
"1.2.0-1",
"1.2.2-1",
"1.3.1-1",
"1.3.2-1",
"1.3.4-1",
"1.4.0-1",
"1.4.1-1",
"1.4.3-1",
"1.5.0-1",
"1.6.0-1",
"1.6.1-1",
"1.6.2-1",
"1.6.3-1",
"1.6.4-1",
"1.6.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49852.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57201 · Revision 1
- Added to Heist Feed
- Publisher date