CVE-2026-76956Disclosure(libexpat_project / libexpat)

LOWCVSS 7.5 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch libexpat_project libexpat systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.

libexpat_project CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

Weakness type (CWE)

CWE-394

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

Patch or workaround signal is available
2 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
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

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters45d
Disclosure
CVE-2026-76956 - DoS in libexpat 2.8.2/2.8.3. Insufficient entropy from getentropy handling enables hash flooding via crafted XML. CVSS 7.5. No patch yet, upgrade to 2.8.4. #CVE #libexpat #infosec https://www.valtersit.com/cve/CVE-2026-76956 #CVE #infosec #SysAdmin #cybersecurity #Linux #devsecops #devops #developer #sysadmin #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #ethicalhacking #cybersecurityawareness #cybersecurity #cybersecuritynews #cybersecuritytips #python #hacker #linux #kali #ubuntu #debian #ukraine #spain #ireland #unitedkingdom #canada #finland #estonia #lithuania #ireland #hungary #denmark #norway #malta #mexico #switczerland #iceland #israel
Post summary
CVE-2026-76956 is a denial‑of‑service flaw in libexpat caused by hash flooding from low entropy, scored CVSS 7.5, and users are advised to upgrade to 2.8.4 pending an official patch.
0000045
1.0K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds46d
Disclosure
CVE-2026-76956 Denial of Service in libexpat 2.8.2/2.8.3 via Insufficient Entropy https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-76956
Post summary
A brief disclosure of CVE-2026-76956, describing a denial‑of‑service flaw in libexpat 2.8.2/2.8.3 caused by insufficient entropy, with no additional details on PoC, exploitation, or mitigation.
00000110
4.1K 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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