CVE-2026-4224 @ Library

"CVE-2026-4224"
"python-stdlib-2.7.13-2"
"python-2.7.13-2"
"python-crypto-2.6.1-7"
"python-dnspython-1.15.0-1+deb9u1"
"python-ldb-1.1.27-1+deb9u2"
"python-minimal-2.7.13-2"
"python-samba"
"Am I vulnerable?"

Status

accepted_risk

Priority

1.75

Match score

4.0

Risk

DoS Remote

CVSS

7.5 HIGH

Reason

cpe: python; pkgs: python, python-crypto, python-dnspython, python-ldb, python-minimal, python-samba; version: in-range: python-stdlib-2.7.13-2, python-2.7.13-2, python-crypto-2.6.1-7, python-dnspython-1.15.0-1+deb9u1, python-ldb-1.1.27-1+deb9u2, python-minimal-2.7.13-2; risk:dos

Created

2026-08-05T14:05:15Z

Updated

2026-08-22T10:15:58Z

Closed

2026-08-05T14:46:21Z

Package interrogation (copy)

Run on the host — click to copy a command. Debian/apt

Package	Commands
python-stdlib-2.7.13-2
python-2.7.13-2
python-crypto-2.6.1-7
python-dnspython-1.15.0-1+deb9u1
python-ldb-1.1.27-1+deb9u2
python-minimal-2.7.13-2
python-samba

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: python-stdlib · python · python-crypto · python-dnspython · python-ldb · python-minimal · python-samba

Same product CVEs in your queue

Other tickets that look like the same product (from match reason). Relate them here to triage this CVE as the primary.

CVE	CVSS	Systems	Status	Matched	Already related
CVE-2026-68770	9.8	morris, mufasa	does_not_affect	python	—
CVE-2026-3644	7.5	Archive, Library, Matrix, Saiph, morris …	accepted_risk, does_not_affect	python	—
CVE-2026-7210	7.5	Archive, Library, Matrix, Saiph, morris …	accepted_risk, not_applicable	python	→ CVE-2026-15308
CVE-2026-15308	7.5	Archive, Library, Matrix, Saiph, morris …	accepted_risk	python	—
CVE-2026-59939	7.5	Bullseye, Matrix, Silk	new	python	—
CVE-2026-30922	7.5	Library	not_applicable	python	→ CVE-2026-59884
CVE-2026-59886	7.5	Library	not_applicable	python	→ CVE-2026-59884
CVE-2026-7246	7.2	Silk	does_not_affect	python	—

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

Debian GNU/Linux 9 (stretch) (9) · debian

Arch

x86_64

kernel_release

uname -r → 4.9.0-19-amd64

kernel_version

uname -v → #1 SMP Debian 4.9.320-2 (2022-06-30)

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
morris	does_not_affect	7.0	2026-08-22T10:15:58Z	Open
mufasa	does_not_affect	7.0	2026-08-22T10:15:58Z	Open
Archive	accepted_risk	0.62	2026-08-22T10:15:58Z	Open
Saiph	accepted_risk	0.62	2026-08-22T10:15:58Z	Open

Description

When an Expat parser with a registered ElementDeclHandler parses an inline
document type definition containing a deeply nested content model a C stack
overflow occurs.

Determination

Vulnerable
Impact: Denial of service (process crash via stack overflow)
Attack: vectorNetwork (if the application parses attacker-controlled XML)
Requirements: Application must use xml.parsers.expat and register an ElementDeclHandler, then feed it a malicious DTD
Common in the wild?  Low — most applications do not register ElementDeclHandler
No public exposure or apps expose DoS

Update status

Add note only

Mitigation log

2026-08-05T14:45:38Z — affects

Vulnerable Impact: Denial of service (process crash via stack overflow) Attack: vectorNetwork (if the application parses attacker-controlled XML) Requirements: Application must use xml.parsers.expat and register an ElementDeclHandler, then feed it a malicious DTD Common in the wild? Low — most applications do not register ElementDeclHandler

2026-08-05T14:46:21Z — accepted_risk

No public exposure or apps expose DoS

References

NVD: CVE-2026-4224