CVE-2026-15308 @ Library

"CVE-2026-15308"
"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

2026-08-03T17:04:48Z

Updated

2026-08-22T10:15:33Z

Closed

2026-08-03T18:07:44Z

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

System	Matches	Ticket for CVE-2026-15308
Archive	python-samba 2:4.9.5+dfsg-5+deb10u5	accepted_risk open
Library	python-samba 2:4.5.16+dfsg-1+deb9u4	accepted_risk open
Saiph	python-samba 2:4.9.5+dfsg-5+deb10u5	accepted_risk open

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-2026-4224	7.5	Archive, Library, Saiph, morris, mufasa	accepted_risk, does_not_affect	python	—
CVE-2026-7210	7.5	Archive, Library, Matrix, Saiph, morris …	accepted_risk, not_applicable	python	→ CVE-2026-15308	linked here
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.

Other CVEs related to this one as primary:

Related CVE	Note	Tickets
CVE-2026-7210	same product as CVE-2026-15308	morris, mufasa, Library, Matrix, Archive, Saiph

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	accepted_risk	7.0	2026-08-22T10:15:33Z	Open
mufasa	accepted_risk	7.0	2026-08-22T10:15:33Z	Open
Matrix	accepted_risk	1.75	2026-08-22T10:15:33Z	Open
Archive	accepted_risk	0.62	2026-08-22T10:15:33Z	Open
Saiph	accepted_risk	0.62	2026-08-22T10:15:33Z	Open

Description

The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.

Determination

Vulnerability: CPU denial-of-service in Python’s incremental HTML parser (html.parser.HTMLParser).
Cause: Processing repeated unterminated markup declarations can cause excessive CPU usage (quadratic behavior).
Impact: Availability only (DoS). No remote code execution or data breach.
Affected: Essentially all CPython versions that include the HTML parser, including Python 2.7.
These servers have no public use that would cause this issue. Only high CPU is risk.

Update status

Add note only

Mitigation log

2026-08-03T17:28:14Z — affects

Vulnerability: CPU denial-of-service in Python’s incremental HTML parser (html.parser.HTMLParser). Cause: Processing repeated unterminated markup declarations can cause excessive CPU usage (quadratic behavior). Impact: Availability only (DoS). No remote code execution or data breach. Affected: Essentially all CPython versions that include the HTML parser, including Python 2.7.

2026-08-03T18:07:44Z — accepted_risk

These servers have no public use that would cause this issue. Only high CPU is risk.

References

NVD: CVE-2026-15308