{"id":"CVE-2026-3338","aliases":["EUVD-2026-9266","GHSA-hfpc-8r3f-gw53","GHSA-jchq-39cv-q4wj","RUSTSEC-2026-0047"],"status":"published","title":"PKCS7_verify Signature Validation Bypass in AWS-LC","description":"Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00776,"percentile":0.56068,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-347"],"published":"2026-03-02T12:00:00Z","modified":"2026-11-09T11:00:03Z","fixes":[{"ecosystem":"crates.io","package":"aws-lc-sys","fixed_in":["0.38.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"aws-lc-sys","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.24.0"},{"fixed":"0.38.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"aws-lc-sys","ranges":[{"type":"SEMVER","events":[{"introduced":"0.24.0"},{"fixed":"0.38.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"aws-lc-sys","ranges":[{"type":"SEMVER","events":[{"introduced":"0.24.0"},{"fixed":"0.38.0"}]}]}],"products":[{"vendor":"amazon","product":"aws-lc-sys"},{"vendor":"amazon","product":"aws_libcrypto"},{"vendor":"aws","product":"aws-lc"},{"vendor":"red hat","product":"confidential compute attestation"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat openshift container platform 4"},{"vendor":"red hat","product":"red hat openshift update service"},{"vendor":"red hat","product":"red hat trusted artifact signer 1.3"},{"vendor":"red hat","product":"red hat trusted profile analyzer"}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-005-AWS/","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://github.com/aws/aws-lc/releases/tag/v1.69.0","tags":["patch","Release Notes","fix"]},{"url":"https://github.com/aws/aws-lc/security/advisories/GHSA-jchq-39cv-q4wj","tags":["third-party-advisory","Vendor Advisory","advisory","web"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-3338","tags":["vdb-entry","x_refsource_REDHAT","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2444025","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3338.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://access.redhat.com/errata/RHSA-2026:5459","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://github.com/aws/aws-lc-rs/security/advisories/GHSA-hfpc-8r3f-gw53","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3338","tags":["advisory"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-005-AWS","tags":["web"]},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0047.html","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-hfpc-8r3f-gw53"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3338.json","tags":["advisory"]},{"url":"https://github.com/aws/aws-lc-rs","tags":["package"]},{"url":"https://crates.io/crates/aws-lc-sys","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-3338","title":"PKCS7_verify Signature Validation Bypass in AWS-LC","description":"Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","status":"published","published":"2026-03-02T21:22:41.954Z","modified":"2026-08-21T12:12:53.379Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-347","CWE-347"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-9266","description":"Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","status":"published","published":"2026-03-02T21:22:41Z","modified":"2026-08-21T12:12:53Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:01:37.96401Z"}],"ghsa":[{"id":"GHSA-hfpc-8r3f-gw53","title":"AWS-LC has PKCS7_verify Signature Validation Bypass","description":"### Summary\nAWS-LC is an open-source, general-purpose cryptographic library.\n\n### Impact\nImproper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\nCustomers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n#### Impacted versions: \naws-lc-sys versions: \u003e= 0.24.0, \u003c 0.38.0\n\n### Patches\nThe patch is included in v0.38.0\n\n### Workarounds\nThere is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n### Resources\nIf there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.","status":"published","published":"2026-03-03T20:25:39Z","modified":"2026-03-20T21:31:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:39:40.633038Z"}],"nvd":[{"id":"CVE-2026-3338","description":"Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","status":"published","published":"2026-03-02T22:16:32.35Z","modified":"2026-07-15T02:20:59.787Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:12:07.420927Z"}],"osv":[{"id":"CVE-2026-3338","title":"PKCS7_verify Signature Validation Bypass in AWS-LC","description":"Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.","status":"published","published":"2026-03-02T21:22:41.954Z","modified":"2026-10-28T10:54:59.09220983Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:45:01.896044Z"},{"id":"GHSA-hfpc-8r3f-gw53","title":"AWS-LC has PKCS7_verify Signature Validation Bypass","description":"### Summary\nAWS-LC is an open-source, general-purpose cryptographic library.\n\n### Impact\nImproper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\nCustomers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n#### Impacted versions: \naws-lc-sys versions: \u003e= 0.24.0, \u003c 0.38.0\n\n### Patches\nThe patch is included in v0.38.0\n\n### Workarounds\nThere is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.\n\n### Resources\nIf there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.","status":"published","published":"2026-03-03T20:25:39Z","modified":"2026-09-10T03:50:39.503997737Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:46:48.920784Z"},{"id":"RUSTSEC-2026-0047","title":"PKCS7_verify Signature Validation Bypass in AWS-LC","description":"Improper signature validation in `PKCS7_verify()` in AWS-LC allows an\nunauthenticated user to bypass signature verification when processing PKCS7\nobjects with Authenticated Attributes.\n\nCustomers of AWS services do not need to take action. `aws-lc-sys` contains\ncode from AWS-LC. Applications using `aws-lc-sys` should upgrade to the most\nrecent release of `aws-lc-sys`.\n\nThere is no workaround; applications using `aws-lc-sys` should upgrade to the \nmost recent release of `aws-lc-sys`.","status":"published","published":"2026-03-02T12:00:00Z","modified":"2026-11-09T11:00:03.699544989Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-09T11:24:16.480676Z"}]}}