CVE-2026-115269

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Source
https://cve.org/CVERecord?id=CVE-2026-115269
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115269.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115269
Aliases
Downstream
Published
2026-10-26T13:30:24Z
Modified
2026-10-28T02:56:13Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
HTTP/2 WINDOW_UPDATE and SETTINGS frames reset the request body read timeout in Bandit
Details

Allocation of Resources Without Limits or Throttling vulnerability in the HTTP/2 request body reader of mtrudel bandit allows an unauthenticated remote attacker to hold stream processes open indefinitely via WINDOW_UPDATE or empty SETTINGS frames sent while a Plug reads the request body.

Bandit.HTTP2.Stream.do_read_data/4 in lib/bandit/http2/stream.ex waits for each frame with a fresh read_timeout. A stream WINDOW_UPDATE, or the zero-delta window update that every empty SETTINGS frame delivers to all streams, ends the wait without delivering any body data, and the loop starts a new full countdown. A client that sends one of these 9-byte frames before each countdown expires keeps read_body blocked, together with the stream process and whatever the application holds while reading, for as long as it likes.

This issue affects bandit: from 1.4.0 before 1.14.0.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-770",
        "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115269.json"
}
References

Affected packages

Git / github.com/mtrudel/bandit

Affected ranges

Type
GIT
Repo
https://github.com/mtrudel/bandit
Events
Introduced
fff06efe3be962b484bd4d3eb339372fda5a231f
Fixed
220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Introduced
e5d4262b07b3e1026c57647b281dccfababea13b
Fixed
220b9dfd27f9a21305be2afc75cbe585ddc24e7a
Fixed
fff06efe3be962b484bd4d3eb339372fda5a231f
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "fff06efe3be962b484bd4d3eb339372fda5a231f"
                },
                {
                    "fixed": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "1.4.0"
                },
                {
                    "fixed": "1.14.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "fff06efe3be962b484bd4d3eb339372fda5a231f"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

1.*
1.10.0
1.10.1
1.10.2
1.10.3
1.10.4
1.11.0
1.11.1
1.12.0
1.12.1
1.12.3
1.12.4
1.12.5
1.13.0
1.13.1
1.4.0
1.4.1
1.4.2
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.5.7
1.6.0
1.6.1
1.6.10
1.6.11
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.6.8
1.6.9
1.7.0
1.8.0
1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115269.json"