How severe is CVE-2017-11362?

CVE-2017-11362 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-2017-11362 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11362?

CVE-2017-11362 primarily affects Php. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-11362?

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.

When was CVE-2017-11362 published?

CVE-2017-11362 was published on 2017-07-17 and last updated on 2026-06-17.

CVE-2017-11362

CVE-2017-11362 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Php
Published: 2017-07-17
Last modified: 2026-06-17

Description

In PHP 7.x before 7.0.21 and 7.1.x before 7.1.7, ext/intl/msgformat/msgformat_parse.c does not restrict the locale length, which allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact within International Components for Unicode (ICU) for C/C++ via a long first argument to the msgfmt_parse_message function.

Frequently asked questions

What is CVE-2017-11362?: In PHP 7.x before 7.0.21 and 7.1.x before 7.1.7, ext/intl/msgformat/msgformat_parse.c does not restrict the locale length, which allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact within International Components for Unicode (ICU) for C/C++ via a long first argument to the msgfmt_parse_message function.
How severe is CVE-2017-11362?: CVE-2017-11362 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-2017-11362 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11362?: CVE-2017-11362 primarily affects Php. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-11362?: 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.
When was CVE-2017-11362 published?: CVE-2017-11362 was published on 2017-07-17 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.6:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.7:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.8:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.9:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.10:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.11:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.12:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.13:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.14:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.15:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.16:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.17:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.18:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.19:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.0.20:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:7.1.6:*:*:*:*:*:*:*

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