CVE-2026-35453

medium

Published 2026-04-28 · Modified 2026-05-08

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CVSS v3

5.4

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

CVSS v4 NEW

4.8

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

VIR risk

5.4

Description

PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer

Predictions

Exploit likelihood

64%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Packagist	phpoffice/phpspreadsheet	`<=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`
Packagist	phpoffice/phpspreadsheet	`>=4.0.0,<5.7.0`	`5.7.0`
Packagist	phpoffice/phpspreadsheet	`>=3.3.0,<3.10.5`	`3.10.5`
Packagist	phpoffice/phpspreadsheet	`>=2.2.0,<2.4.5`	`2.4.5`
Packagist	phpoffice/phpspreadsheet	`>=2.0.0,<2.1.16`	`2.1.16`
Packagist	phpoffice/phpspreadsheet	`<1.30.4`	`1.30.4`
COMPOSER	phpoffice/phpspreadsheet	`<= 1.30.3`	`1.30.4`
COMPOSER	phpoffice/phpspreadsheet	`>= 2.0.0, <= 2.1.15`	`2.1.16`
COMPOSER	phpoffice/phpspreadsheet	`>= 2.2.0, <= 2.4.4`	`2.4.5`
COMPOSER	phpoffice/phpspreadsheet	`>= 3.3.0, <= 3.10.4`	`3.10.5`
COMPOSER	phpoffice/phpspreadsheet	`>= 4.0.0, <= 5.6.0`	`5.7.0`

Application impact

Vendor	Product	Versions	Fixed
phpoffice	phpspreadsheet	`{"endExcluding":"1.30.4"}`	`1.30.4`

References

CWEs

CWE-79

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.