Debian dla-4711 : python3-starlette - security update

medium Nessus Plugin ID 331605

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 12 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4711 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4711-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert August 01, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : starlette Version : 0.26.1-1+deb12u2 CVE ID : CVE-2026-48817 CVE-2026-54282 CVE-2026-54283 Debian Bug : 1140631 1140632

Multiple vulnerabilities were found in starlette, a lightweight ASGI (Asynchronous Server Gateway Interface) framework/toolkit.

CVE-2026-48817

A vulnerability exists where an HTTPEndpoint subclass is registered through Route() without an explicit methods argument, and the route does not constrain the method and every method reaches the endpoint.

CVE-2026-54282

A vulnerability exists where the HTTP request path is not validated before being used to reconstruct request.url which can poison request.url.hostname and request.url.netloc.

CVE-2026-54283

The max_fields and max_part_size limits for request.form() are enforced for multipart/form-data, but silently ignored for application/x-www- form-urlencoded.

For Debian 12 bookworm, these problems have been fixed in version 0.26.1-1+deb12u2.

We recommend that you upgrade your starlette packages.

For the detailed security status of starlette please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/starlette

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the python3-starlette packages.

Plugin Details

Severity: Medium

ID: 331605

File Name: debian_DLA-4711.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/2/2026

Updated: 8/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2026-54282

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:python3-starlette

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 8/1/2026

Vulnerability Publication Date: 6/15/2026

Reference Information

CVE: CVE-2026-48817, CVE-2026-54282, CVE-2026-54283

Detections

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