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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-108360
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-22 18:17:26 UTC
Updated2026-10-23 19:42:24 UTC
DescriptionPhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, Worksheet\Drawing::setPath validates only the initial external-image URL with setIsWhitelisted when setAllowExternalImages is enabled. The HTTP stream context permits PHP to follow a redirect without applying the callback to the redirected URL, so a permitted image host can redirect the server to an internal address and cause a blind GET request. The response body is not returned to the attacker because the reader validates the downloaded content as an image and removes the temporary file, but internal GET-driven endpoints, network reachability, and cloud metadata endpoints may be reached. This issue is fixed in versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-863 | CWE-918 | CWE-863 CWE-863: Incorrect Authorization | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PHPOffice PhpSpreadsheet affected < 1.30.7 Not specified
CNA PHPOffice PhpSpreadsheet affected >= 2.0.0, < 2.1.19 Not specified
CNA PHPOffice PhpSpreadsheet affected >= 2.2.0, < 2.4.8 Not specified
CNA PHPOffice PhpSpreadsheet affected >= 3.3.0, < 3.10.8 Not specified
CNA PHPOffice PhpSpreadsheet affected >= 4.0.0, < 5.10.0 Not specified

References

ReferenceSourceLinkTags
github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8 [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/commit/94590951d76a250a5fc1ecf69a0b3... [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8 [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0 [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2phh-27fw-q4gc [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19 [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1... [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f... [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7 [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce5... [email protected] github.com
github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4... [email protected] github.com
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