DEBIAN-CVE-2026-48990
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In versions 1.3.4 through 1.6.5, joserfc accepts oversized RFC7797 b64=false JWS payloads without applying JWSRegistry.max_payload_length, which can lead to resource exhaustion. The normal JWS compact and flattened JSON paths reject payloads above the configured payload-size limit with ExceededSizeError. The RFC7797 unencoded payload paths do not make the same check. A valid b64=false compact or flattened JSON JWS can therefore deserialize successfully with a payload larger than JWSRegistry.max_payload_length. Applications that accept lower-trust JWS values and rely on joserfc to reject oversized token content during verification have a moderate availability risk. This issue has been fixed in version 1.6.7.
DEBIAN-CVE-2026-48990
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-2026-48990
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/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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48990.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-2026-48990.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56598 · Revision 1
- Added to Heist Feed
- Publisher date