CVE-2025-69534

highpriority · track · 30EPSS 0.006 · 49 %ileCHDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.60% (49th) EPSS
CVSS 7.5 · high
Is it mine?
32 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedpython311-Markdown-0:3.5.2-150600.3.3.1.noarch as component of openSUSE Leap 15.6suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • No fix availableLabX Standardmettler_toledo_psirt

    This vulnerability will be fixed in the upcoming releases

02

cvss

Technical severity, 0–10. One row per scoring source.

8.2
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–8.2

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.18.2highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6
v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Hsecondaryexploitability 3.9 · impact 4.2
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Mettler-Toledo PSIRT
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · SUSE Product Security
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-248USCWE-400USCWE-400USCWE-617USCWE-617USCWE-617US
05

affected products (32)

Products and version ranges known to be affected.

showing 20 of 32
06

advisories (5)

Vendor and ecosystem advisories describing this.

  • SUSE-SU-2026:0846-1Security update for python-Markdown2026-03-06csaf · suse_csafDE

    Security update for python-Markdown

  • VDE-2026-088METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.42026-08-20csaf · mettler_toledo_psirtCH

    The vulnerabilities found in LabX Standard versions 21.3.22 - 21.4.23 are CVE-2025-69419, CVE-2026-0915, CVE-2025-15467, CVE-2026-4800, CVE-2026-33186, CVE-2026-39821, CVE-2026-33671 and are fixed in LabX Standard v21.4.25. The vulnerabilities found in LabX Enterprise versions 21.3.22 - 21.4.23 are CVE-2026-4800, CVE-2026-33186, CVE-2026-39821, CVE-2026-33671 and are fixed in LabX Enterprise v21.4.25 All other vulnerabilities are to be fixed in the upcoming releases.

  • WID-SEC-W-2026-1610Red Hat Enterprise Linux (JWCrypto und python-markdown): Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2026-05-19csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • GHSA-5wmx-573v-2qwqPython-Markdown has an Uncaught Exception2026-03-05ghsa · osvUS

    Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions.

  • PYSEC-2026-892026-03-05vendor · osvUS

    Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions.

07

also known as (7)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvcert_bundsuse_csafmettler_toledo_psirtNVDCVE.orgMITRE
published 2026-03-05modified 2026-09-17
09

references (26)

External citations — patches, advisories, analysis.

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