CVE-2026-20031Patch

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-248

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 6 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 4 signals
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • Peaked 3d ago at 2 mentions (2026-03-04); latest day: 1
  • 6 total mentions across 4 days

Deep dive

Activity timeline6 mentions / 4d
01122Mentions · 2026-03-04: 2Mentions · 2026-03-05: 2Mentions · 2026-03-06: 1Mentions · 2026-04-28: 1Patch / Workaround · 2026-03-04: 1Patch / Workaround · 2026-03-05: 2Patch / Workaround · 2026-04-28: 1Technical Details · 2026-03-04: 1Technical Details · 2026-03-05: 203-0403-0503-0604-28
Signal classification3 categories
Patch
466.7%
Disclosure
116.7%
General
116.7%
Referenced assets5 URLs
Classification over time
DateTotalLabels
2026-03-042
Disclosure1Patch1
2026-03-052
Patch2
2026-03-061
General1
2026-04-281
Patch1
Full discourse6 posts
  • Ferramentas Linux@Cezar_H_Linux
    Patch

    CVE-2026-20031 crashes ClamAV on SUSE? Here's the patch script. But one script = one CVE. Practical Binary Analysis = ALL the CVEs you haven't seen yet. Read more-> http://tinyurl.com/49x7vnnd https://t.co/MYx8M92tMI

    Post summary

    The tweet announces a patch script for CVE‑2026‑20031, noting it crashes ClamAV on SUSE, but offers no exploit details or evidence of active exploitation.

    1001056
    1.5K followersView on X
  • CVETrends@CVEShield
    General

    Top 5 Trending CVEs: 1 - CVE-2026-20031 2 - CVE-2026-1731 3 - CVE-2026-20122 4 - CVE-2026-22719 5 - CVE-2026-20127 #cve #cvetrends #cveshield #cybersecurity https://www.cveshield.com/dashboard

    Post summary

    The post merely headlines a list of top trending CVEs on a dashboard without offering technical details or actionable information.

    00010232
    1.7K followersView on X
  • Grok@grok
    Patch

    ClamAV is a free open-source antivirus engine (from Cisco Talos) that scans files, emails, and web traffic for malware. The image is its official logo—a red devil clam. This post announces security updates: v1.5.2 and v1.4.4 fix CVE-2026-20031 (HTML parser crash/DoS) plus JPEG/TIFF bugs and more. Update via http://clamav.net if you run it. Blog has full details.

    Post summary

    ClamAV releases v1.5.2 and v1.4.4 to patch CVE‑2026‑20031, an HTML parser crash/DoS flaw, along with fixes for JPEG/TIFF bugs; users are encouraged to update from the official site.

    1000060
    8.4M followersView on X
  • Autumn Good@autumn_good_35
    Patch

    『Fixed an error handling bug in the HTML file parser that may crash the program and cause a DoS condition.』 CVE-2026-20031 ClamAV® blog: ClamAV 1.5.2 and 1.4.4 security patch versions published https://blog.clamav.net/2026/03/clamav-152-and-144-security-patch.html

    Post summary

    ClamAV released patches 1.5.2 and 1.4.4 to fix a DoS‑causing error handling bug in its HTML parser.

    00000354
    6.7K followersView on X
  • SecuriteInfo.com@SecuriteInfoCom
    Patch

    CVE-2026-20031 corrected in ClamAV 1.5.2 and 1.4.4 https://blog.clamav.net/2026/03/clamav-152-and-144-security-patch.html

    Post summary

    ClamAV has released updates 1.5.2 and 1.4.4 that patch CVE-2026-20031. The announcement is linked via a blog post.

    0000048
    490 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-20031 A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition… https://www.cve.org/CVERecord?id=CVE-2026-20031

    Post summary

    The post announces the discovery of a DoS vulnerability in ClamAV's CSS module, without evidence of exploitation or PoC.

    00000120
    56.6K followersView on X

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