DEBIAN-CVE-2026-59884

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Source
https://security-tracker.debian.org/tracker/CVE-2026-59884
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59884.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-59884
Upstream
Published
2026-07-14T17:17:14Z
Modified
2026-09-14T17:03:25Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.

References

Affected packages

Debian:12 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.4.8-3+deb12u3

Affected versions

0.*
0.4.8-3
0.4.8-3+deb12u1
0.4.8-3+deb12u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59884.json"

Debian:13 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.6.1-1+deb13u3

Affected versions

0.*
0.6.1-1
0.6.1-1+deb13u1
0.6.1-1+deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59884.json"

Debian:14 / pyasn1

Package

Name
pyasn1
Purl
pkg:deb/debian/pyasn1?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.6.4-1

Affected versions

0.*
0.6.1-1
0.6.2-1~bpo13+1
0.6.2-1
0.6.3-1
0.6.4-1~bpo13+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-59884.json"