DEBIAN-CVE-2026-19553

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Source
https://security-tracker.debian.org/tracker/CVE-2026-19553
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-19553
Upstream
  • CVE-2026-19553
Published
2026-09-30T17:16:45Z
Modified
2026-10-01T06:47:43Z
Severity
  • 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

ssl.SSLContext.wrap_bio() didn't require the server_hostname argument to not be None if ssl.SSLContext.check_hostname was set. Due to a missing parameter check in SSLObject, if the server_hostname argument isn't supplied then hostname verification would be silently skipped. This defect could lead to programs where certificate hostname verification appeared to be succeeding with SSLContext.check_hostname = True and no ValueError being raised due to misconfiguration. If the program passes a server_hostname value that isn't an empty string or None to any of these APIs then certificate hostname verification proceeds as expected and the program is not affected by this vulnerability. Mitigating this vulnerability doesn't require updating Python or applying the patch. To mitigate, pass a valid non-None and non-empty server_hostname value to SSLContext.wrap_bio(), asyncio.create_connection(), or asyncio.loop.start_tls() and certificate hostname verification will proceed as expected. Upgrading to the latest version of Python or applying the patch only changes the behavior from silently skipping hostname verification to raising a ValueError, similar to SSLContext.wrap_socket(), when server_hostname isn't supplied.

References

Affected packages

Debian:12
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.3.11+dfsg-2
7.3.11+dfsg-2+deb12u1
7.3.11+dfsg-2+deb12u2
7.3.11+dfsg-2+deb12u3
7.3.12~rc1+dfsg-1
7.3.12~rc2+dfsg-1
7.3.12+dfsg-1
7.3.13+dfsg-1
7.3.14+dfsg-1
7.3.15+dfsg-1
7.3.16+dfsg-1
7.3.16+dfsg-2
7.3.17+dfsg-1
7.3.17+dfsg-2
7.3.17+dfsg-3
7.3.18+dfsg-1
7.3.18+dfsg-2
7.3.19+dfsg-1
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2
8.*
8.0.0+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
python3.11

Package

Name
python3.11
Purl
pkg:deb/debian/python3.11?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.11.2-6
3.11.2-6+deb12u1
3.11.2-6+deb12u2
3.11.2-6+deb12u3
3.11.2-6+deb12u4
3.11.2-6+deb12u5
3.11.2-6+deb12u6
3.11.2-6+deb12u7
3.11.2-6+deb12u8
3.11.3-1
3.11.3-2
3.11.4-1
3.11.5-1
3.11.5-2
3.11.5-3
3.11.6-1
3.11.6-2
3.11.6-3~hurd.2
3.11.6-3
3.11.7-1
3.11.7-2
3.11.8-1
3.11.8-1.1~exp1
3.11.8-1.1~exp2
3.11.8-2
3.11.8-3
3.11.8-3+hurd.1
3.11.9-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
Debian:13
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2
8.*
8.0.0+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
python3.13

Package

Name
python3.13
Purl
pkg:deb/debian/python3.13?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.13.5-2
3.13.5-2+deb13u1
3.13.5-2+deb13u2
3.13.5-2+deb13u3
3.13.5-2+deb13u4
3.13.5-2+deb13u5
3.13.6-1
3.13.7-1
3.13.8-1
3.13.9-1
3.13.11-1
3.13.12-1
3.13.14-1
3.13.15-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
Debian:14
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4
7.3.21+dfsg-1
7.3.21+dfsg-2
7.3.21+dfsg-3
7.3.21+dfsg-4
7.3.22+dfsg-1
7.3.23+dfsg-1
7.3.23+dfsg-2
8.*
8.0.0+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
python3.13

Package

Name
python3.13
Purl
pkg:deb/debian/python3.13?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.13.5-2
3.13.6-1
3.13.7-1
3.13.8-1
3.13.9-1
3.13.11-1
3.13.12-1
3.13.14-1
3.13.15-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
python3.14

Package

Name
python3.14
Purl
pkg:deb/debian/python3.14?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.14.0~a7-1
3.14.0~b1-1
3.14.0~b2-1
3.14.0~b3-1
3.14.0~b4-1
3.14.0~rc1-1
3.14.0~rc2-1
3.14.0~rc3-1
3.14.0-1
3.14.0-2
3.14.0-3
3.14.0-4
3.14.0-5
3.14.2-1
3.14.3-1
3.14.3-2
3.14.3-3
3.14.3-4
3.14.3-5
3.14.4-1
3.14.4-2
3.14.5~rc1-1
3.14.5-1
3.14.6-1
3.14.7-1
3.14.7-2
3.14.7-3
3.14.7-4
3.14.7-5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"
python3.15

Package

Name
python3.15
Purl
pkg:deb/debian/python3.15?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.15.0~a8-1
3.15.0~a8-2
3.15.0~b1-1
3.15.0~b1-2
3.15.0~b1-3
3.15.0~b2-1
3.15.0~b3-1
3.15.0~b4-1
3.15.0~rc1-1
3.15.0~rc2-1
3.15.0~rc2-2
3.15.0~rc2-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19553.json"