Lucene search
+L

PHPSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion

🗓️ 23 Jul 2026 15:01:50Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 29 Views

PhpSpreadsheet OLE reader can loop on sector chain in malicious XLS OLE metadata, exhausting memory.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-59933
28 Jul 202617:29
–attackerkb
bdu_fstec
BDU FSTEC
PhpSpreadsheet OLERead Buffer Overflow DoS
22 Jul 202600:00
–bdu_fstec
circl
Circl
CVE-2026-59933
23 Jul 202615:31
–circl
cve
CVE
CVE-2026-59933
28 Jul 202617:29
–cve
cvelist
Cvelist
CVE-2026-59933 PhpSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion
28 Jul 202617:29
–cvelist
euvd
EUVD
EUVD-2026-49930
28 Jul 202617:29
–euvd
mend
Mend
CVE-2026-59933
28 Jul 202617:29
–mend
nvd
NVD
CVE-2026-59933
28 Jul 202618:17
–nvd
osv_clsa
osv_clsa
CLSA-2026-1786530064 TuxCare security update for phpoffice/phpspreadsheet (2 CVEs)
12 Aug 202610:21
–osv_clsa
osv_cve
osv_cve
CVE-2026-59933 PhpSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion
28 Jul 202617:29
–osv_cve
Rows per page
Vulners
Node
OR
phpofficephpspreadsheetRange≤1.30.5composer
phpofficephpspreadsheetRange2.0.0–2.1.17composer
phpofficephpspreadsheetRange2.2.0–2.4.6composer
phpofficephpspreadsheetRange3.3.0–3.10.6composer
phpofficephpspreadsheetRange4.0.0–5.8.0composer

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

23 Jul 2026 15:01Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.5
EPSS0.007
SSVC
29