CVE-2026-12043

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Source

https://cve.org/CVERecord?id=CVE-2026-12043

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12043.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-12043

Aliases

GHSA-rmjr-3qpm-vh98

Published

2026-06-12T18:35:51.420Z

Modified

2026-08-12T15:31:16.217128Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Heap double-free in AWS Common Runtime aws-c-http

Details

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2 HEADERS frames.

To remediate this issue, users should upgrade to aws-c-http version 0.11.0.

Database specific

{
    "cwe_ids": [
        "CWE-415"
    ],
    "cna_assigner": "AMZN",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12043.json"
}

References

Affected packages

Git / github.com/awslabs/aws-c-http

Affected ranges

Type

GIT

Repo

https://github.com/awslabs/aws-c-http

Events

Introduced

4abad0db65ab744614030dbfe81851ed598c8a1b

Fixed

8aefd899fc3210bfd0e3fd414011a3cb708bf6e4

Database specific

Show details

{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0.4.22"
        },
        {
            "last_affected": "0.10.15"
        }
    ]
}

Affected versions

v0.*

v0.10.0

v0.10.1

v0.10.10

v0.10.11

v0.10.12

v0.10.13

v0.10.14

v0.10.15

v0.10.2

v0.10.3

v0.10.4

v0.10.5

v0.10.6

v0.10.7

v0.10.8

v0.10.9

v0.4.22

v0.4.23

v0.4.24

v0.4.25

v0.4.26

v0.4.27

v0.4.28

v0.5.1

v0.5.10

v0.5.11

v0.5.12

v0.5.13

v0.5.14

v0.5.15

v0.5.16

v0.5.17

v0.5.18

v0.5.19

v0.5.2

v0.5.3

v0.5.4

v0.5.5

v0.5.6

v0.5.7

v0.5.8

v0.5.9

v0.6.0

v0.6.1

v0.6.10

v0.6.11

v0.6.12

v0.6.13

v0.6.14

v0.6.15

v0.6.16

v0.6.17

v0.6.18

v0.6.19

v0.6.2

v0.6.20

v0.6.21

v0.6.22

v0.6.23

v0.6.24

v0.6.25

v0.6.26

v0.6.27

v0.6.28

v0.6.29

v0.6.3

v0.6.4

v0.6.5

v0.6.6

v0.6.7

v0.6.8

v0.6.9

v0.7.0

v0.7.1

v0.7.10

v0.7.11

v0.7.12

v0.7.13

v0.7.14

v0.7.15

v0.7.2

v0.7.3

v0.7.4

v0.7.5

v0.7.6

v0.7.7

v0.7.8

v0.7.9

v0.8.0

v0.8.1

v0.8.10

v0.8.2

v0.8.3

v0.8.4

v0.8.5

v0.8.6

v0.8.7

v0.8.8

v0.8.9

v0.9.0

v0.9.1

v0.9.2

v0.9.3

v0.9.4

v0.9.5

v0.9.6

v0.9.7

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12043.json"

vanir_signatures

[
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "96872287347827358514189847538865503800",
            "length": 1720.0
        },
        "target": {
            "function": "aws_hpack_insert_header",
            "file": "source/hpack.c"
        },
        "source": "https://github.com/awslabs/aws-c-http/commit/8aefd899fc3210bfd0e3fd414011a3cb708bf6e4",
        "signature_version": "v1",
        "id": "CVE-2026-12043-1e4611ee",
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "124280645356525196712215732137927032157",
                "301642393092662340053319807357650229914",
                "165157777276860542560711956794670399568",
                "269278956214626889427380669948856080101",
                "181842221093139609251344321025937765665",
                "170262867104208531698686581472785423691",
                "280867948920478112109425199030879810598",
                "124492402619103279128665481606357510439"
            ]
        },
        "target": {
            "file": "source/hpack.c"
        },
        "source": "https://github.com/awslabs/aws-c-http/commit/8aefd899fc3210bfd0e3fd414011a3cb708bf6e4",
        "signature_version": "v1",
        "id": "CVE-2026-12043-8ae36b79",
        "deprecated": false
    }
]

vanir_signatures_modified

"2026-08-12T15:31:16Z"