How severe is CVE-2026-7261?

CVE-2026-7261 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7261?

CVE-2026-7261 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7261?

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

Does CVE-2026-7261 have an EU (EUVD) identifier?

Yes. CVE-2026-7261 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28970.

When was CVE-2026-7261 published?

CVE-2026-7261 was published on 2026-05-10 and last updated on 2026-06-17.

CVE-2026-7261

CVE-2026-7261 is a critical-severity vulnerability in Php with a CVSS 3.x base score of 9.8. 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-416.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 6.3
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28970
Weakness: CWE-416
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, when SoapServer is configured with SOAP_PERSISTENCE_SESSION, the handler object is persisted across requests via session storage. However, in the case SOAP requests results in an error, the persistance is handled incorrectly, resulting in freeing the object while keeping a pointer to it, which may lead to use-after-free. This may lead to memory corruption, information disclosure, or process crashes, with confidentiality, integrity, and availability impact on the vulnerable system.

Frequently asked questions

What is CVE-2026-7261?: 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, when SoapServer is configured with SOAP_PERSISTENCE_SESSION, the handler object is persisted across requests via session storage. However, in the case SOAP requests results in an error, the persistance is handled incorrectly, resulting in freeing the object while keeping a pointer to it, which may lead to use-after-free. This may lead to memory corruption, information disclosure, or process crashes, with confidentiality, integrity, and availability impact on the vulnerable system.
How severe is CVE-2026-7261?: CVE-2026-7261 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7261?: CVE-2026-7261 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-7261 have an EU (EUVD) identifier?: Yes. CVE-2026-7261 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28970.
When was CVE-2026-7261 published?: CVE-2026-7261 was published on 2026-05-10 and last updated on 2026-06-17.

References

https://github.com/php/php-src/security/advisories/GHSA-m33r-qmcv-p97q

Affected products (1)

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

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Other CWE-416 (Use After Free) vulnerabilities

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CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) 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)
69.57.172.96 (ipv4-addr)
45.61.173.86 (ipv4-addr)
82.39.35.211 (ipv4-addr)
39.164.91.67 (ipv4-addr)