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CVE-2026-1642

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b9b4da73698f1ffd9ad0df4d8919722f94ca104853ec37703ebbca2fed7db000
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","product":"NGINX Open Source","vendor":"F5","versions":[{"changes":[{"at":"1.28.2","status":"unaffected"}],"lessThan":"1.29.5","status":"affected","version":"1.3.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/affected/0

{"defaultStatus":"unknown","product":"NGINX Plus","vendor":"F5","versions":[{"lessThan":"R36 P2","status":"affected","version":"R36","versionType":"custom"},{"lessThan":"R35 P1","status":"affected","version":"R35","versionType":"custom"},{"lessThan":"*","status":"affected","version":"R34","versionType":"custom"},{"lessThan":"*","status":"affected","version":"R33","versionType":"custom"},{"lessThan":"R32 P4","status":"affected","version":"R32","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/affected/1
cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

2 source assertions
{"defaultStatus":"unknown","product":"NGINX Open Source","vendor":"F5","versions":[{"changes":[{"at":"1.28.2","status":"unaffected"}],"lessThan":"1.29.5","status":"affected","version":"1.3.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/affected/0
{"defaultStatus":"unknown","product":"NGINX Plus","vendor":"F5","versions":[{"lessThan":"R36 P2","status":"affected","version":"R36","versionType":"custom"},{"lessThan":"R35 P1","status":"affected","version":"R35","versionType":"custom"},{"lessThan":"*","status":"affected","version":"R34","versionType":"custom"},{"lessThan":"*","status":"affected","version":"R33","versionType":"custom"},{"lessThan":"R32 P4","status":"affected","version":"R32","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-349","description":"CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/02/05/1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /containers/adp/1/references/0
{"tags":["vendor-advisory"],"url":"https://my.f5.com/manage/s/article/K000159824"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:14555e9559f6e1bec0cce56a6049e89989e46415521bfbc89b5d5d60c3ad3cab · sha256:e19448c33dd07189… · /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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