[MEDIUM] PhpSpreadsheet: SSRF whitelist bypass via unre-validated HTTP redirect in Drawing::setPath external image loading

PKSA-r15m-kszr-8n8q CVE-2026-108360 GHSA-2phh-27fw-q4gc

Affected version: <=1.30.6|>=2.0.0,<=2.1.18|>=2.2.0,<=2.4.7|>=3.3.0,<=3.10.7|>=4.0.0,<=5.9.0

Reported by:
GitHub

[HIGH] PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)

PKSA-dxd5-wy68-pq29 CVE-2026-108359 GHSA-j2w7-387v-m2rq

Affected version: <=1.30.6|>=2.0.0,<=2.1.18|>=2.2.0,<=2.4.7|>=3.3.0,<=3.10.7|>=4.0.0,<=5.9.0

Reported by:
GitHub

[HIGH] PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service

PKSA-96jv-mtjg-g2v8 CVE-2026-108358 GHSA-3x94-m842-937c

Affected version: <=1.30.6|>=2.0.0,<=2.1.18|>=2.2.0,<=2.4.7|>=3.3.0,<=3.10.7|>=4.0.0,<=5.9.0

Reported by:
GitHub

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

PKSA-r22k-87hv-mfk4 CVE-2026-59933 GHSA-xh5m-36r6-47m3

Affected version: <=1.30.5|>=2.0.0,<=2.1.17|>=2.2.0,<=2.4.6|>=3.3.0,<=3.10.6|>=4.0.0,<=5.8.0

Reported by:
GitHub

[HIGH] PHPSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

PKSA-m9cr-9614-rsf7 CVE-2026-59932 GHSA-2mrg-gjxq-2gvr

Affected version: <=1.30.5|>=2.0.0,<=2.1.17|>=2.2.0,<=2.4.6|>=3.3.0,<=3.10.6|>=4.0.0,<=5.8.0

Reported by:
GitHub

[HIGH] PHPSpreadsheet: SSRF bypass via HTTP redirect in WEBSERVICE() domain whitelist

PKSA-dqzt-yst9-1w9y CVE-2026-59931 GHSA-6hq5-7373-42rg

Affected version: <=1.30.5|>=2.0.0,<=2.1.17|>=2.2.0,<=2.4.6|>=3.3.0,<=3.10.6|>=4.0.0,<=5.8.0

Reported by:
GitHub

[HIGH] PhpSpreadsheet has CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions

PKSA-gz3f-3cz3-3wsw CVE-2026-40902 GHSA-7c6m-4442-2x6m

Affected version: <=1.30.3|>=2.0.0,<=2.1.15|>=2.2.0,<=2.4.4|>=3.3.0,<=3.10.4|>=4.0.0,<=5.6.0

Reported by:
GitHub

[HIGH] PhpSpreadsheet has CPU Denial of Service via Unbounded Row Index in SpreadsheetML XML Reader

PKSA-x13r-n4wc-4gcr CVE-2026-40863 GHSA-84wq-86v6-x5j6

Affected version: <=1.30.5|>=2.0.0,<=2.1.15|>=2.2.0,<=2.4.4|>=3.3.0,<=3.10.4|>=4.0.0,<=5.6.0

Reported by:
GitHub

[MEDIUM] PhpSpreadsheet has XSS via number format code with @ text placeholder bypasses htmlspecialchars in HTML writer

PKSA-hznc-gbby-6w16 CVE-2026-40296 GHSA-hrmw-qprp-wgmc

Affected version: <=1.30.3|>=2.0.0,<=2.1.15|>=2.2.0,<=2.4.4|>=3.3.0,<=3.10.4|>=4.0.0,<=5.6.0

Reported by:
GitHub

[MEDIUM] PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer

PKSA-jtdk-dcr5-f11n CVE-2026-35453 GHSA-6wpp-88cp-7q68

Affected version: <=1.30.3|>=2.0.0,<=2.1.15|>=2.2.0,<=2.4.4|>=3.3.0,<=3.10.4|>=4.0.0,<=5.6.0

Reported by:
GitHub