CVE & CISA-KEV Catalog

CVE-2026-48142

MEDIUM
4.8
CVSS v3
NVD

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CWE-125Out-of-bounds Read

How to fix

Remediation Available
nginxDebian
Fixed in:1.18.0-6.1+deb11u8CVE-2026-48142
Fixed in:1.26.3-3+deb13u7CVE-2026-48142
Fixed in:1.30.1-5CVE-2026-48142
nginxUbuntu
Fixed in:1.18.0-6ubuntu14.16USN-8458-1
Fixed in:1.24.0-2ubuntu7.13USN-8458-1
Fixed in:1.28.0-6ubuntu1.8USN-8458-1
nginx-coreUbuntu
Fixed in:1.18.0-6ubuntu14.16USN-8458-1
Fixed in:1.24.0-2ubuntu7.13USN-8458-1
Fixed in:1.28.0-6ubuntu1.8USN-8458-1
nginx-extrasUbuntu
Fixed in:1.18.0-6ubuntu14.16USN-8458-1
Fixed in:1.24.0-2ubuntu7.13USN-8458-1
Fixed in:1.28.0-6ubuntu1.8USN-8458-1
nginx-fullUbuntu
Fixed in:1.18.0-6ubuntu14.16USN-8458-1
Fixed in:1.24.0-2ubuntu7.13USN-8458-1
Fixed in:1.28.0-6ubuntu1.8USN-8458-1
nginx-lightUbuntu
Fixed in:1.18.0-6ubuntu14.16USN-8458-1
Fixed in:1.24.0-2ubuntu7.13USN-8458-1
Fixed in:1.28.0-6ubuntu1.8USN-8458-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityNone
AvailabilityLow

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

Exploit Intelligence

0.40%probability of exploitation in 30 days
32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Vendor Advisory1
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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-22.