CVE-2026-27140 (GCVE-0-2026-27140)

Vulnerability from cvelistv5 – Published: 2026-04-08 01:06 – Updated: 2026-07-09 12:09
VLAI
Title
Code execution vulnerability in SWIG code generation in cmd/go
Summary
SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-501 - Trust Boundary Violation
  • CWE-641 - Improper Restriction of Names for Files and Other Resources
Assigner
Go
References
URL Tags
https://go.dev/cl/763768
https://go.dev/issue/78335
https://groups.google.com/g/golang-announce/c/0uY…
https://pkg.go.dev/vuln/GO-2026-4871
https://access.redhat.com/security/cve/CVE-2026-27140 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2456341 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:16024 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10217 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10704 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16698 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16697 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16694 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16494 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16498 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16497 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16021 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10219 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:34099 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25182 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:23246 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Go toolchain cmd/go Affected: 0 , < 1.25.9 (semver)
Affected: 1.26.0-0 , < 1.26.2 (semver)
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
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Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.6)     cpe:/a:redhat:rhel_e4s:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.6)     cpe:/a:redhat:rhel_tus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat OpenShift Container Platform 4.17     cpe:/a:redhat:openshift:4.17::el9
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Red Hat Red Hat OpenShift Container Platform 4.18     cpe:/a:redhat:openshift:4.18::el9
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Red Hat Red Hat OpenShift Container Platform 4.19     cpe:/a:redhat:openshift:4.19::el9
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
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Red Hat OpenShift Service Mesh 2     cpe:/a:redhat:service_mesh:2
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Red Hat OpenShift Service Mesh 3     cpe:/a:redhat:service_mesh:3
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Credits
Juho Forsén of Mattermost
Show details on NVD website
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This could lead to code smuggling and arbitrary code execution, bypassing trust mechanisms and allowing the attacker to run unauthorized code.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-641\", \"description\": \"Improper Restriction of Names for Files and Other Resources\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-09T12:09:27.651Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-27140\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-09T03:55:58.901718Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-13T13:22:00.796Z\"}}], \"cna\": {\"title\": \"Code execution vulnerability in SWIG code generation in cmd/go\", \"credits\": [{\"lang\": \"en\", \"value\": \"Juho Fors\\u00e9n of Mattermost\"}], \"affected\": [{\"vendor\": \"Go toolchain\", \"product\": \"cmd/go\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.25.9\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"1.26.0-0\", \"lessThan\": \"1.26.2\", \"versionType\": \"semver\"}], \"packageName\": \"cmd/go\", \"collectionURL\": \"https://pkg.go.dev\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://go.dev/cl/763768\"}, {\"url\": \"https://go.dev/issue/78335\"}, {\"url\": \"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2026-4871\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"SWIG file names containing \u0027cgo\u0027 and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-501: Trust Boundary Violation\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2026-04-08T01:06:57.893Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-27140\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-09T12:09:27.651Z\", \"dateReserved\": \"2026-02-17T19:57:28.435Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2026-04-08T01:06:57.893Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.