Vulnerability-Lookup

CVE-2026-115269 (GCVE-0-2026-115269)

Vulnerability from cvelistv5 – Published: 2026-10-26 13:30 – Updated: 2026-10-26 15:35

Title

HTTP/2 WINDOW_UPDATE and SETTINGS frames reset the request body read timeout in Bandit

Summary

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.

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-26 15:02 UTC

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

EEF CNA under the mitre root

CNA scorecard A 97/100 over 341 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/mtrudel/bandit/security/adviso…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-115269.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-115269	related
https://github.com/mtrudel/bandit/commit/fff06efe…	related
https://github.com/mtrudel/bandit/commit/220b9dfd…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
mtrudel	bandit	Affected: 1.4.0 , < 1.14.0 (semver) cpe:2.3:a:mtrudel:bandit::::::::
mtrudel	bandit	Affected: fff06efe3be962b484bd4d3eb339372fda5a231f , < 220b9dfd27f9a21305be2afc75cbe585ddc24e7a (git) cpe:2.3:a:mtrudel:bandit::::::::

Credits

Peter Ullrich Daniel Coles Mat Trudel Jonatan Männchen / EEF

Show details on NVD website

JSON

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                "vectorString": "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/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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-115269",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-26T15:02:19.174445Z",
                "version": "2.0.3"
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        },
        "published": "2026-10-26T14:16:31.290",
        "references": [
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            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "url": "https://cna.erlef.org/cves/CVE-2026-115269.html"
          },
          {
            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "url": "https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
          },
          {
            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "url": "https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f"
          },
          {
            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "url": "https://github.com/mtrudel/bandit/security/advisories/GHSA-p2qv-vx88-385x"
          },
          {
            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "url": "https://osv.dev/vulnerability/EEF-CVE-2026-115269"
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        ],
        "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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            "description": [
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                "value": "CWE-770"
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              {
                "lang": "en",
                "value": "CWE-835"
              }
            ],
            "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-115269",
                    "options": [
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                        "Exploitation": "none"
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                      {
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              "dateUpdated": "2026-10-26T15:33:07.848Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
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            "title": "CISA ADP Vulnrichment"
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        "cna": {
          "affected": [
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              "collectionURL": "https://repo.hex.pm",
              "cpes": [
                "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
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              "versions": [
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          "cpeApplicability": [
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                {
                  "cpeMatch": [
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          "credits": [
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              "value": "Mat Trudel"
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          "dateAssigned": "2026-10-23T13:25:29.000Z",
          "descriptions": [
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              "supportingMedia": [
                {
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                  "type": "text/html",
                  "value": "\u003cp\u003eAllocation 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.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eBandit.HTTP2.Stream.do_read_data/4\u003c/code\u003e in \u003ccode\u003elib/bandit/http2/stream.ex\u003c/code\u003e waits for each frame with a fresh \u003ccode\u003eread_timeout\u003c/code\u003e. 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 \u003ccode\u003eread_body\u003c/code\u003e blocked, together with the stream process and whatever the application holds while reading, for as long as it likes.\u003c/p\u003e\n\u003cp\u003eThis issue affects bandit: from 1.4.0 before 1.14.0.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "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.\n\n`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.\n\nThis issue affects bandit: from 1.4.0 before 1.14.0."
                }
              ],
              "value": "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.\n\nBandit.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.\n\nThis issue affects bandit: from 1.4.0 before 1.14.0."
            }
          ],
          "impacts": [
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              "capecId": "CAPEC-469",
              "descriptions": [
                {
                  "lang": "en",
                  "supportingMedia": [
                    {
                      "base64": false,
                      "type": "text/html",
                      "value": "\u003cp\u003eAn unauthenticated client can keep a Bandit HTTP/2 stream, and whatever its request handler holds while reading the body, occupied indefinitely for 9 bytes per \u003ccode\u003eread_timeout\u003c/code\u003e, and repeat this across many streams and connections. This affects any Bandit server with HTTP/2 enabled whose routes read request bodies, which \u003ccode\u003ePlug.Parsers\u003c/code\u003e does for POST, PUT and PATCH.\u003c/p\u003e"
                    },
                    {
                      "base64": false,
                      "type": "text/markdown",
                      "value": "An unauthenticated client can keep a Bandit HTTP/2 stream, and whatever its request handler holds while reading the body, occupied indefinitely for 9 bytes per `read_timeout`, and repeat this across many streams and connections. This affects any Bandit server with HTTP/2 enabled whose routes read request bodies, which `Plug.Parsers` does for POST, PUT and PATCH."
                    }
                  ],
                  "value": "An unauthenticated client can keep a Bandit HTTP/2 stream, and whatever its request handler holds while reading the body, occupied indefinitely for 9 bytes per read_timeout, and repeat this across many streams and connections. This affects any Bandit server with HTTP/2 enabled whose routes read request bodies, which Plug.Parsers does for POST, PUT and PATCH."
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 8.7,
                "baseSeverity": "HIGH",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
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                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "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",
                "version": "4.0",
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                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "scenarios": [
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                  "value": "GENERAL"
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          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-835",
                  "description": "CWE-835 Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-770",
                  "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-26T13:30:24.621Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "name": "HTTP/2 WINDOW_UPDATE and SETTINGS frames reset the request body read timeout in Bandit",
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/mtrudel/bandit/security/advisories/GHSA-p2qv-vx88-385x"
            },
            {
              "name": "EEF CNA record for CVE-2026-115269",
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-115269.html"
            },
            {
              "name": "OSV record EEF-CVE-2026-115269",
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-115269"
            },
            {
              "name": "Introducing commit fff06ef in mtrudel/bandit",
              "tags": [
                "related"
              ],
              "url": "https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f"
            },
            {
              "name": "Fix commit 220b9df in mtrudel/bandit",
              "tags": [
                "patch"
              ],
              "url": "https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "HTTP/2 WINDOW_UPDATE and SETTINGS frames reset the request body read timeout in Bandit",
          "workarounds": [
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              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eDisable HTTP/2 with \u003ccode\u003ehttp_2_options: [enabled: false]\u003c/code\u003e, so that the vulnerable read path never runs.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "Disable HTTP/2 with `http_2_options: [enabled: false]`, so that the vulnerable read path never runs."
                }
              ],
              "value": "Disable HTTP/2 with http_2_options: [enabled: false], so that the vulnerable read path never runs."
            }
          ],
          "x_proofOfConcept": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003col\u003e\n\u003cli\u003eRun Bandit with a Plug that calls \u003ccode\u003ePlug.Conn.read_body/2\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eOpen an HTTP/2 connection and send HEADERS for \u003ccode\u003ePOST /\u003c/code\u003e on stream 1 without END_STREAM.\u003c/li\u003e\n\u003cli\u003eEvery 10 seconds, send a WINDOW_UPDATE on stream 1 with an increment of 1.\u003c/li\u003e\n\u003cli\u003eThe stream stays open for 120 s, eight times the default 15 s \u003ccode\u003eread_timeout\u003c/code\u003e. Without the WINDOW_UPDATE frames, the server ends the read after about 15 s.\u003c/li\u003e\n\u003c/ol\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "1. Run Bandit with a Plug that calls `Plug.Conn.read_body/2`.\n2. Open an HTTP/2 connection and send HEADERS for `POST /` on stream 1 without END_STREAM.\n3. Every 10 seconds, send a WINDOW_UPDATE on stream 1 with an increment of 1.\n4. The stream stays open for 120 s, eight times the default 15 s `read_timeout`. Without the WINDOW_UPDATE frames, the server ends the read after about 15 s."
                }
              ],
              "value": "* Run Bandit with a Plug that calls Plug.Conn.read_body/2.\n* Open an HTTP/2 connection and send HEADERS for POST / on stream 1 without END_STREAM.\n* Every 10 seconds, send a WINDOW_UPDATE on stream 1 with an increment of 1.\n* The stream stays open for 120 s, eight times the default 15 s read_timeout. Without the WINDOW_UPDATE frames, the server ends the read after about 15 s."
            }
          ],
          "x_technicalAnalysis": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003e\u003cstrong\u003e1. Per-receive timeout.\u003c/strong\u003e \u003ccode\u003eBandit.HTTP2.Stream.read_data/2\u003c/code\u003e passes a flat \u003ccode\u003eread_timeout\u003c/code\u003e (default 15,000 ms) to \u003ccode\u003edo_read_data/4\u003c/code\u003e, which blocks in \u003ccode\u003edo_recv/2\u003c/code\u003e\u0027s \u003ccode\u003ereceive ... after timeout\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Non-progress frames end the wait.\u003c/strong\u003e A stream WINDOW_UPDATE, delivered through \u003ccode\u003eBandit.HTTP2.Connection.handle_frame/3\u003c/code\u003e, or an empty SETTINGS frame, which delivers a zero-delta window update to every stream, is matched inside that \u003ccode\u003ereceive\u003c/code\u003e. \u003ccode\u003edo_recv_send_window_update/2\u003c/code\u003e returns a bare \u003ccode\u003e%Stream{}\u003c/code\u003e, and \u003ccode\u003edo_read_data/4\u003c/code\u003e recurses with the identical \u003ccode\u003etimeout\u003c/code\u003e, restarting the countdown.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Nothing else bounds the read.\u003c/strong\u003e The transport read timeout fires only when no bytes arrive, \u003ccode\u003emax_bytes\u003c/code\u003e is decremented only by DATA frames, and neither WINDOW_UPDATE nor SETTINGS frames are rate limited. The send path in \u003ccode\u003edo_send_data/4\u003c/code\u003e uses a progress-based deadline; the read path does not.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "**1. Per-receive timeout.** `Bandit.HTTP2.Stream.read_data/2` passes a flat `read_timeout` (default 15,000 ms) to `do_read_data/4`, which blocks in `do_recv/2`\u0027s `receive ... after timeout`.\n\n**2. Non-progress frames end the wait.** A stream WINDOW_UPDATE, delivered through `Bandit.HTTP2.Connection.handle_frame/3`, or an empty SETTINGS frame, which delivers a zero-delta window update to every stream, is matched inside that `receive`. `do_recv_send_window_update/2` returns a bare `%Stream{}`, and `do_read_data/4` recurses with the identical `timeout`, restarting the countdown.\n\n**3. Nothing else bounds the read.** The transport read timeout fires only when no bytes arrive, `max_bytes` is decremented only by DATA frames, and neither WINDOW_UPDATE nor SETTINGS frames are rate limited. The send path in `do_send_data/4` uses a progress-based deadline; the read path does not."
                }
              ],
              "value": "1. Per-receive timeout. Bandit.HTTP2.Stream.read_data/2 passes a flat read_timeout (default 15,000 ms) to do_read_data/4, which blocks in do_recv/2\u0027s receive ... after timeout.\n\n2. Non-progress frames end the wait. A stream WINDOW_UPDATE, delivered through Bandit.HTTP2.Connection.handle_frame/3, or an empty SETTINGS frame, which delivers a zero-delta window update to every stream, is matched inside that receive. do_recv_send_window_update/2 returns a bare %Stream{}, and do_read_data/4 recurses with the identical timeout, restarting the countdown.\n\n3. Nothing else bounds the read. The transport read timeout fires only when no bytes arrive, max_bytes is decremented only by DATA frames, and neither WINDOW_UPDATE nor SETTINGS frames are rate limited. The send path in do_send_data/4 uses a progress-based deadline; the read path does not."
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-115269",
        "datePublished": "2026-10-26T13:30:24.621Z",
        "dateReserved": "2026-10-23T10:15:01.872Z",
        "dateUpdated": "2026-10-26T15:35:52.079Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-115269

Vulnerability from fkie_nvd - Published: 2026-10-26 14:16 - Updated: 2026-10-26 16:59

Severity

8.7 (High) - 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

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-115269.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/mtrudel/bandit/security/advisories/GHSA-p2qv-vx88-385x
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-115269

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "packageName": "bandit",
          "packageURL": "pkg:hex/bandit",
          "product": "bandit",
          "repo": "https://github.com/mtrudel/bandit",
          "vendor": "mtrudel",
          "versions": [
            {
              "lessThan": "1.14.0",
              "status": "affected",
              "version": "1.4.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "packageName": "mtrudel/bandit",
          "packageURL": "pkg:github/mtrudel/bandit",
          "product": "bandit",
          "repo": "https://github.com/mtrudel/bandit",
          "vendor": "mtrudel",
          "versions": [
            {
              "lessThan": "220b9dfd27f9a21305be2afc75cbe585ddc24e7a",
              "status": "affected",
              "version": "fff06efe3be962b484bd4d3eb339372fda5a231f",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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.\n\nBandit.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.\n\nThis issue affects bandit: from 1.4.0 before 1.14.0."
    }
  ],
  "id": "CVE-2026-115269",
  "lastModified": "2026-10-26T16:59:16.113",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-115269",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-26T15:02:19.174445Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-26T14:16:31.290",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-115269.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/mtrudel/bandit/security/advisories/GHSA-p2qv-vx88-385x"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-115269"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        },
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

UBUNTU-CVE-2026-115269 (CVE-2026-115269)

Vulnerability from osv_ubuntu – Published: 2026-10-26 14:16 – Updated: 2026-10-28 17:50 – Source website

Details

Severity

8.7 (High)


                    
                      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

8.7 (High)


                    
                      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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-115269	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-115269	REPORT
	https://cna.erlef.org/cves/cve-2026-115269.html	REPORT
	https://github.com/mtrudel/bandit/commit/220b9dfd…	REPORT
	https://github.com/mtrudel/bandit/commit/fff06efe…	REPORT
	https://github.com/mtrudel/bandit/security/adviso…	REPORT
	https://hex.pm/packages/bandit	REPORT
	https://github.com	REPORT
	https://github.com/mtrudel/bandit	REPORT
	https://repo.hex.pm	REPORT
	https://github.com/cveproject/cvelistv5/tree/main…	REPORT
	https://nvd.nist.gov/vuln/detail/cve-2026-115269	REPORT
	https://osv.dev/vulnerability/eef-cve-2026-115269	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "0.13.2-3"
          },
          {
            "binary_name": "python-bandit",
            "binary_version": "0.13.2-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "0.13.2-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@0.13.2-3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13.2-1",
        "0.13.2-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.4.0-0ubuntu2"
          },
          {
            "binary_name": "python-bandit",
            "binary_version": "1.4.0-0ubuntu2"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.4.0-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.4.0-0ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.1-3",
        "1.6.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.6.2-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.6.2-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.6.2-3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.2-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.9.4-1"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.9.4-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.9.4-1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.7.10-3",
        "1.9.4-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "bandit",
            "binary_version": "1.7.10-3"
          },
          {
            "binary_name": "python3-bandit",
            "binary_version": "1.7.10-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "bandit",
        "purl": "pkg:deb/ubuntu/bandit@1.7.10-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.7.10-2",
        "1.7.10-3"
      ]
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2026-115269",
  "modified": "2026-10-28T17:50:37Z",
  "published": "2026-10-26T14:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://cna.erlef.org/cves/cve-2026-115269.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/commit/fff06efe3be962b484bd4d3eb339372fda5a231f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit/security/advisories/ghsa-p2qv-vx88-385x"
    },
    {
      "type": "REPORT",
      "url": "https://hex.pm/packages/bandit"
    },
    {
      "type": "REPORT",
      "url": "https://github.com"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mtrudel/bandit"
    },
    {
      "type": "REPORT",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cveproject/cvelistv5/tree/main/cves/2026/115xxx/cve-2026-115269.json"
    },
    {
      "type": "REPORT",
      "url": "https://nvd.nist.gov/vuln/detail/cve-2026-115269"
    },
    {
      "type": "REPORT",
      "url": "https://osv.dev/vulnerability/eef-cve-2026-115269"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-115269"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2026-115269 (GCVE-0-2026-115269)

FKIE_CVE-2026-115269

UBUNTU-CVE-2026-115269 (CVE-2026-115269)

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Nomenclature

Vulnerability timeline

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