How severe is CVE-2026-7258?

CVE-2026-7258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-7258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7258?

CVE-2026-7258 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7258?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-7258 have an EU (EUVD) identifier?

Yes. CVE-2026-7258 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28968.

When was CVE-2026-7258 published?

CVE-2026-7258 was published on 2026-05-10 and last updated on 2026-06-17.

CVE-2026-7258

CVE-2026-7258 is a high-severity vulnerability in Php with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.3
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28968
Weakness: CWE-125
Affected product: Php
Published: 2026-05-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-7258?: 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.
How severe is CVE-2026-7258?: CVE-2026-7258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-7258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7258?: CVE-2026-7258 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-7258 have an EU (EUVD) identifier?: Yes. CVE-2026-7258 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28968.
When was CVE-2026-7258 published?: CVE-2026-7258 was published on 2026-05-10 and last updated on 2026-06-17.

References

https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4

Affected products (1)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

Browse all CWE-125 (Out-of-bounds Read) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

117.53.44.117 (ipv4-addr)
41.205.23.59 (ipv4-addr)
192.3.134.24 (ipv4-addr)
95.169.191.176 (ipv4-addr)
45.61.173.86 (ipv4-addr)
82.39.35.211 (ipv4-addr)
39.164.91.67 (ipv4-addr)
211.63.214.90 (ipv4-addr)