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VulnerabilityPublished

CVE-2026-48817: Kludex starlette · Unsafe Reflection

Affects Kludex starletteSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 1.1.0 when convenient.

Data as of 30 Oct 2026, 20:25 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.1.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Kludex starlette to 1.1.0.

Affected software

ProductAffectedFixed in
KludexstarletteAffected
  • <1.1.0
Fixed in
  • 1.1.0
PyPIstarlettepkg:pypi/starletteOther threatsAffected
  • <1.1.0
Fixed in
  • 1.1.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade starlette to version 1.1.0 or later, where this vulnerability is fixed. Since the vendor advisory does not provide additional remediation details, applying the official fix is the recommended action. Patch status is confirmed fixed in version 1.1.0.

Description

Starlette versions prior to 1.1.0 have a vulnerability in the HTTPEndpoint dispatch mechanism where unsafe reflection is used to select request handlers. This allows non-standard HTTP methods to invoke internal methods not intended as handlers if the subclass does not explicitly restrict HTTP methods, potentially bypassing authorization. The issue is fixed in version 1.1.0.

References

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