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CVE-2026-42790

A flaw was found in Erlang OTP public_key. This improper certificate validation vulnerability allows a subordinate Certificate Authority (CA) with restricted DNS nameConstraints to bypass these restrictions. By issuing a leaf certificate that lacks a Subject Alternative Name (SAN) but contains a crafted CommonName (CN), an attacker can trick an Erlang OTP TLS client into accepting it as valid for an out-of-scope hostname. This can lead to hostname spoofing and potential man-in-the-middle attacks
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:36fae579aee85692216aa0b463bbdf14a031d6584f6e738bfeb8af6f4ac28ba2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 5 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["pubkey_cert","public_key"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/public_key/src/pubkey_cert.erl","lib/public_key/src/public_key.erl"],"programRoutines":[{"name":"pubkey_cert:validate_names/6"},{"name":"public_key:pkix_verify_hostname/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"26.2.5.21","status":"unaffected"},{"at":"27.3.4.12","status":"unaffected"},{"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/affected/1

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["pubkey_cert","public_key"],"packageName":"public_key","packageURL":"pkg:otp/public_key?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/pubkey_cert.erl","src/public_key.erl"],"programRoutines":[{"name":"pubkey_cert:validate_names/6"},{"name":"public_key:pkix_verify_hostname/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"1.15.1.7","status":"unaffected"},{"at"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:18.0"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 18.0","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:16.2"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 16.2","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:17.1"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 17.1","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/1
cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.6,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/metrics/0/cvssV4_0
cwe · 3 assertions

{"cweId":"CWE-297","description":"CWE-297 Improper Validation of Certificate with Host Mismatch","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/problemTypes/0/descriptions/1

{"cweId":"CWE-295","description":"Improper Certificate Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/problemTypes/0/descriptions/0

{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

5 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["pubkey_cert","public_key"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/public_key/src/pubkey_cert.erl","lib/public_key/src/public_key.erl"],"programRoutines":[{"name":"pubkey_cert:validate_names/6"},{"name":"public_key:pkix_verify_hostname/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"26.2.5.21","status":"unaffected"},{"at":"27.3.4.12","status":"unaffected"},{"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/affected/1
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["pubkey_cert","public_key"],"packageName":"public_key","packageURL":"pkg:otp/public_key?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/pubkey_cert.erl","src/public_key.erl"],"programRoutines":[{"name":"pubkey_cert:validate_names/6"},{"name":"public_key:pkix_verify_hostname/3"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"1.15.1.7","status":"unaffected"},{"at"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:18.0"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 18.0","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:16.2"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 16.2","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:17.1"],"defaultStatus":"affected","packageName":"erlang","product":"Red Hat OpenStack Platform 17.1","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.6,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-297","description":"CWE-297 Improper Validation of Certificate with Host Mismatch","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-295","description":"Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/problemTypes/0/descriptions/0

Source references

11 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:39809"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-42790"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/references/0
{"name":"RHBZ#2482286","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482286"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/references/1
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-42790.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/0769050c69d73762672b0db1347b6993a5b31759"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/21abed64eb2026b5f82f432709e4e932f9be389a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/6
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/fb67c6d1836f51105a96d8b769e71e4215a79457"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/5
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-22cw-4ph4-6447"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-42790"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/2
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42790.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/adp/1/references/2
{"tags":["x_version-scheme"],"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dad57e67c3acb11b6979e6a32949db98577512c215fdcd0addbe8c02d8689de8 · sha256:09974a635702cc0d… · /containers/cna/references/3

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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