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    3 vulnerabilities

    CVE-2026-105768 (GCVE-0-2026-105768)

    Vulnerability from cvelistv5 – Published: 2026-10-05 20:17 – Updated: 2026-10-05 20:17
    VLAI
    Title
    apko /etc/passwd and /etc/group UID/GID truncation writes package-supplied entries as root
    Summary
    apko allows users to build and publish OCI container images built from apk packages. From version 0.2.0 to before version 1.4.5, UserEntry.Parse and GroupEntry.Parse in pkg/passwd read the UID and GID fields of /etc/passwd and /etc/group entries with strconv.Atoi and convert them to uint32 without a range check. On 64-bit platforms an out-of-range value such as 4294967296 (2^32) is truncated to 0, and negative values wrap. Because apko parses the passwd and group entries supplied by the packages it installs and writes them back into the image, an attacker who controls a package installed into the image can ship an entry that appears to declare an unprivileged UID or GID but is written into the built image as UID 0 or GID 0 (root). The truncated UID is also used when resolving the image's run-as user. This issue has been fixed in version 1.4.5.
    CWE
    • CWE-197 - Numeric Truncation Error
    Impacted products
    Vendor Product Version
    chainguard-dev apko Affected: 0.2.0 , < 1.4.5 (semver)
    Create a notification for this product.
    Date Public
    2026-09-23 22:40
    Show details on NVD website

    {
      "containers": {
        "cna": {
          "affected": [
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "modules": [
                "pkg/passwd"
              ],
              "packageName": "chainguard.dev/apko",
              "product": "apko",
              "programFiles": [
                "pkg/passwd/passwd.go",
                "pkg/passwd/group.go"
              ],
              "programRoutines": [
                {
                  "name": "passwd.UserEntry.Parse"
                },
                {
                  "name": "passwd.GroupEntry.Parse"
                }
              ],
              "repo": "https://github.com/chainguard-dev/apko",
              "vendor": "chainguard-dev",
              "versions": [
                {
                  "lessThan": "1.4.5",
                  "status": "affected",
                  "version": "0.2.0",
                  "versionType": "semver"
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                }
              ],
              "value": "apko runs on a 64-bit platform and installs a package that supplies /etc/passwd or /etc/group entries with an out-of-range UID or GID."
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          ],
          "credits": [
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              "lang": "en",
              "type": "reporter",
              "value": "Fernando (https://github.com/fthomasella)"
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              "lang": "en",
              "type": "remediation developer",
              "value": "Jorge Lucangeli Obes (https://github.com/jlucangelio)"
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              "lang": "en",
              "type": "remediation reviewer",
              "value": "Steve Beattie (https://github.com/stevebeattie)"
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              "lang": "en",
              "type": "coordinator",
              "value": "SunnyR (https://github.com/SunnyR)"
            },
            {
              "lang": "en",
              "type": "coordinator",
              "value": "Chainguard (https://chainguard.dev)"
            }
          ],
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            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-128",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-128 Integer Attacks"
                }
              ]
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          ],
          "metrics": [
            {
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                "Recovery": "NOT_DEFINED",
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                  "cweId": "CWE-197",
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              "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-rj6x-hwpv-vhvf"
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              "supportingMedia": [
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              ],
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              "lang": "en",
              "time": "2026-09-21T22:49:00.000Z",
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              "time": "2026-09-23T22:40:00.000Z",
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            },
            {
              "lang": "en",
              "time": "2026-09-28T00:51:00.000Z",
              "value": "apko v1.4.5 released"
            }
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        "assignerShortName": "chainguard",
        "cveId": "CVE-2026-105768",
        "datePublished": "2026-10-05T20:17:46.477Z",
        "dateReserved": "2026-10-05T19:21:04.930Z",
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    CVE-2026-105767 (GCVE-0-2026-105767)

    Vulnerability from cvelistv5 – Published: 2026-10-05 19:48 – Updated: 2026-10-05 19:48
    VLAI
    Title
    Chainguard Academy (edu) integrate-platform-docs composite action interpolates inputs into shell commands
    Summary
    Improper Neutralization of Special Elements used in an OS Command in the integrate-platform-docs composite GitHub Action of Chainguard Academy (edu) from commit 7375a80caabcc31c33ec90f29687ed78c13d16ff before commit fb0efb2537d326ab18c07d620875b8ed2a4b39f3 allows an actor who controls the project_id or storage_bucket inputs to execute arbitrary shell commands on the GitHub Actions runner, because the inputs are interpolated directly into Bash gcloud storage cp commands in several steps via ${{ inputs.* }} expressions. The only in-repository caller passed repository secrets and ran only on trusted triggers, so no untrusted input was known to reach the vulnerable steps.
    CWE
    • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
    Impacted products
    Vendor Product Version
    Chainguard Chainguard Academy (edu) Affected: 7375a80caabcc31c33ec90f29687ed78c13d16ff , < fb0efb2537d326ab18c07d620875b8ed2a4b39f3 (git)
    Create a notification for this product.
    Date Public
    2026-06-26 18:13
    Show details on NVD website

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              "defaultStatus": "unaffected",
              "modules": [
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              ],
              "platforms": [
                "GitHub Actions"
              ],
              "product": "Chainguard Academy (edu)",
              "programFiles": [
                ".github/actions/integrate-platform-docs/action.yaml",
                ".github/workflows/integrate-platform-docs/action.yaml",
                ".github/workflows/integrate-enforce-docs/action.yaml"
              ],
              "repo": "https://github.com/chainguard-dev/edu",
              "vendor": "Chainguard",
              "versions": [
                {
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              ],
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          ],
          "credits": [
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              "lang": "en",
              "type": "remediation developer",
              "value": "Steve Beattie (https://github.com/stevebeattie)"
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              "value": "SunnyR (https://github.com/SunnyR)"
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              "value": "Action introduced with inline input interpolation (chainguard-dev/edu#227)"
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              "time": "2026-06-26T18:13:00.000Z",
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        "assignerShortName": "chainguard",
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        "datePublished": "2026-10-05T19:48:47.712Z",
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    CVE-2026-105766 (GCVE-0-2026-105766)

    Vulnerability from cvelistv5 – Published: 2026-10-05 19:45 – Updated: 2026-10-05 19:45 Exclusively Hosted Service
    VLAI
    Title
    Chainguard Academy (edu) Nginx directory redirect downgrades HTTPS requests to HTTP
    Summary
    Use of the backend-facing $scheme variable in the trailing-slash directory redirect in nginx.conf of Chainguard Academy (edu) from commit 0b75ff98057f69b044a3e7194e428066ac5ad0d4 before commit 93dc0e50739c225f5aee2e803800a47fc0feb906 allows an on-path network attacker to read or modify documentation content served to a victim via an HTTPS request for a slashless directory path, because TLS terminates at the load balancer in front of Nginx and the resulting 301 response redirects the client to a plaintext http:// URL. Browsers that ship the HSTS preload list are not affected, because the .dev top-level domain is preloaded; clients that do not enforce HSTS, such as command-line HTTP clients and scripts that follow redirects, are affected.
    CWE
    • CWE-319 - Cleartext Transmission of Sensitive Information
    Impacted products
    Vendor Product Version
    Chainguard Chainguard Academy (edu) Affected: 0b75ff98057f69b044a3e7194e428066ac5ad0d4 , < 93dc0e50739c225f5aee2e803800a47fc0feb906 (git)
    Create a notification for this product.
    Date Public
    2026-09-11 16:16
    Show details on NVD website

    {
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              ],
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              "lang": "en",
              "type": "remediation developer",
              "value": "Matthew Helmke (https://github.com/matthewhelmke)"
            },
            {
              "lang": "en",
              "type": "coordinator",
              "value": "SunnyR (https://github.com/SunnyR)"
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              "type": "coordinator",
              "value": "Chainguard (https://chainguard.dev)"
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                  "value": "\u003cp\u003eUse of the backend-facing \u003ccode\u003e$scheme\u003c/code\u003e variable in the trailing-slash directory redirect in \u003ccode\u003enginx.conf\u003c/code\u003e of Chainguard Academy (edu) from commit 0b75ff98057f69b044a3e7194e428066ac5ad0d4 before commit 93dc0e50739c225f5aee2e803800a47fc0feb906 allows an on-path network attacker to read or modify documentation content served to a victim via an HTTPS request for a slashless directory path, because TLS terminates at the load balancer in front of Nginx and the resulting 301 response redirects the client to a plaintext \u003ccode\u003ehttp://\u003c/code\u003e URL. Browsers that ship the HSTS preload list are not affected, because the \u003ccode\u003e.dev\u003c/code\u003e top-level domain is preloaded; clients that do not enforce HSTS, such as command-line HTTP clients and scripts that follow redirects, are affected.\u003c/p\u003e"
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                  "value": "CAPEC-94 Adversary in the Middle (AiTM)"
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              "time": "2025-07-14T21:34:00.000Z",
              "value": "Vulnerable redirect introduced (chainguard-dev/edu#2411)"
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              "time": "2026-09-11T16:16:00.000Z",
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