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VulnerabilityPublished

CVE-2026-109799: SAP Cloud SDK for Python · Improper Verification of Cryptographic Signature

Affects SAP Cloud SDK for PythonSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 0.63.1 soon.

Data as of 10 Nov 2026, 01:47 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (sap)CVSS 3.17.5
Patch
Available – fixed in 0.63.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 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 9 Nov 2026.

What to do

Upgrade SAP Cloud SDK for Python to 0.63.1.

Affected software

ProductAffectedFixed in
SAP_SESAP Cloud SDK for PythonAffected
  • <0.63.1
Fixed in
  • 0.63.1

AI-suggested

Upgrade SAP Cloud SDK for Python to version 0.63.1 or later, where the improper signature verification in IASContextProvider is fixed. No other mitigation is required as the vendor has provided an official fix.

Description

CVE-2026-109799 is a high-severity vulnerability in SAP Cloud SDK for Python versions prior to 0.63.1. It involves improper verification of cryptographic signatures in the IASContextProvider component, which extracts claims from JWT tokens without validating their signatures. This flaw allows remote attackers to submit self-signed JWTs with forged tenant and user identities, causing these forged identities to propagate to various runtime context consumers such as telemetry, logs, audit events, and tenant routing. The issue was fixed in version 0.63.1.

References

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