CVE-2026-56409Disclosure(libexpat_project / libexpat)

LOWCVSS 6.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.

libexpat_project CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Patch / fix

https://github.com/libexpat/libexpat/pull/1259

Weakness type (CWE)

CWE-190

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

libexpat

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

libexpat_project

Products

libexpat

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud92d
Disclosure
🚨*CVE* CVE-2026-56409 xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used. https://www.cve.org/CVERecord?id=CVE-2026-56409 ----- Traducción: CVE-2026-56409 xmlwf en libexpat antes de 2.8.2 tiene un desbordamiento entero pa… http://infoflow.cloud`
Post summary
The post announces CVE-2026-56409, describing an integer overflow in libexpat’s XML parsing when using the -d outputDir option, but does not provide PoC, exploit, or mitigation details.
0000030
88 followersView on X
CVE@CVEnew92d
Disclosure
CVE-2026-56409 xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used. https://www.cve.org/CVERecord?id=CVE-2026-56409
Post summary
The text discloses an integer overflow vulnerability in libexpat's xmlwf when the -d outputDir flag is used, highlighting a new CVE.
00000380
57.7K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	libexpat_project	libexpat	-	-	-

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