CVE detail
CVE-2026-56405
libexpat before 2.8.2 has an integer overflow in getAttributeId.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 11.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 1
- within the 30d window
- Peak daily
- 1
- highest bucket
Evidence
Source links by recency
2 source links · newest first
Information published.
vendormsrc.microsoft.comJun 28, 2026, 8:59 AMNo excerpt available.
Exploitgithub.comJun 21, 2026, 4:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2026-56411CVSS 6.9 · Medium
xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
- CVE-2026-56410CVSS 6.9 · Medium
xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
- CVE-2026-56409CVSS 6.5 · Medium
xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
- CVE-2026-56408CVSS 6.9 · Medium
libexpat before 2.8.2 has an integer overflow in copyString.
- CVE-2026-56407CVSS 6.9 · Medium
libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.
- CVE-2026-56406CVSS 6.9 · Medium
libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.