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CVE-2026-48142

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fac02f68e45d55b6efe6e0db193e9362b4456eb06c654d6169eaabc6830140cf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unknown","modules":["ngx_http_charset_module"],"product":"NGINX Open Source","vendor":"F5","versions":[{"lessThan":"1.31.2","status":"affected","version":"1.13.10","versionType":"custom"},{"lessThan":"1.30.3","status":"affected","version":"1.30.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/affected/0

{"defaultStatus":"unaffected","modules":["ngx_http_charset_module"],"product":"NGINX Plus","vendor":"F5","versions":[{"lessThan":"37.0.2.1","status":"affected","version":"37.0","versionType":"custom"},{"lessThan":"R36 P6","status":"affected","version":"R36","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/affected/1
cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NO…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

2 source assertions
{"defaultStatus":"unknown","modules":["ngx_http_charset_module"],"product":"NGINX Open Source","vendor":"F5","versions":[{"lessThan":"1.31.2","status":"affected","version":"1.13.10","versionType":"custom"},{"lessThan":"1.30.3","status":"affected","version":"1.30.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/affected/0
{"defaultStatus":"unaffected","modules":["ngx_http_charset_module"],"product":"NGINX Plus","vendor":"F5","versions":[{"lessThan":"37.0.2.1","status":"affected","version":"37.0","versionType":"custom"},{"lessThan":"R36 P6","status":"affected","version":"R36","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NO…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"tags":["vendor-advisory"],"url":"https://my.f5.com/manage/s/article/K000161585"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4d0648eead88ca32d2de6be3d48fc59e0b140bd7e1001a2bd16ace112ef38efb · sha256:f60ef156460c11db… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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