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CVE-2026-7258

Out-of-bounds read in urldecode() on NetBSD

Medium6.3EPSS 0.36%
Published
Updated
Reserved
Assigned by
php

Description

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

Scores

CVSS scores of CVE-2026-7258, by who scored it
Scored byCVSSScoreVector
phpCNA (assigner)4.0Medium6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Amber
NVDNVD · Analyzed4.0Medium6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:Amber
EPSS (exploitation in 30 days)
0.36% · top 70% of all CVEs (5 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.

Weakness

Affected products

  • PHP Group · PHP

    • affected 8.2.* – < 8.2.31
    • affected 8.3.* – < 8.3.31
    • affected 8.4.* – < 8.4.21
    • affected 8.5.* – < 8.5.6

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .