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CVE-2026-113351

7.5, high

libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 41% of scored CVEs
Exploitation
No public evidence
Published
20 Oct 202615 days ago

Description

libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail with XML_ERROR_NO_MEMORY until it is recreated.

Details

Vendor
Libexpat
Product
libexpat
Weakness
CWE-909 (opens in a new tab)
Status
Analyzed
Updated
3 Nov 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 5

Patches and fixes 2

Other references 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Libexpat CVEs

Every Libexpat CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-117610 libexpat NULL Pointer Dereference Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-118370 libexpat Integer Overflow Vulnerability EPSS 0.4% 8.2, high
  • CVE-2026-115506 libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in… EPSS 0.4% 7.5, high
  • CVE-2026-77214 libexpat Out-of-Bounds Read Vulnerability EPSS 0.3% 8.2, high

Beyond this page

Is CVE-2026-113351 in your network?

This page tells you how dangerous CVE-2026-113351 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 4 Nov 2026, not the live upstream state.