DEBIAN-CVE-2026-119195

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Source
https://security-tracker.debian.org/tracker/CVE-2026-119195
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-119195.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-119195
Upstream
Published
2026-10-29T20:17:30Z
Modified
2026-10-30T09:00:08Z
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 0.6.5, constructed string and indefinite-length ANY decoding repeatedly concatenates each fragment onto a growing bytes value. Attacker-controlled BER or CER data can use many constructed OCTET STRING or character-string fragments. DER rejects constructed OCTET STRING without a schema, but accepts its definite-length form when asn1Spec selects univ.OctetString; it also accepts constructed character strings such as UTF8String without a schema, even though those encodings are not valid DER. The separate indefinite-length ANY path is reachable in BER and CER when asn1Spec selects univ.Any; DER rejects indefinite lengths. OctetStringPayloadDecoder uses growing header concatenation and AnyPayloadDecoder.indefLenValueDecoder uses growing chunk concatenation, repeatedly copying an increasing prefix and causing quadratic work. A sufficiently fragmented value can occupy decoding workers and cause CPU exhaustion without confidentiality or integrity impact. This issue is fixed in version 0.6.5.

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

Affected versions

0.*
0.4.8-3
0.4.8-3+deb12u1
0.4.8-3+deb12u2
0.4.8-3+deb12u3
0.4.8-4
0.5.1-1
0.6.0-1
0.6.1-1
0.6.2-1~bpo13+1
0.6.2-1
0.6.3-1
0.6.4-1~bpo13+1
0.6.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-119195.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

Affected versions

0.*
0.6.1-1
0.6.1-1+deb13u1
0.6.1-1+deb13u2
0.6.1-1+deb13u3
0.6.2-1~bpo13+1
0.6.2-1
0.6.3-1
0.6.4-1~bpo13+1
0.6.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-119195.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

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
0.6.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-119195.json"