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VulnerabilityPublished Updated

CVE-2026-9058: Krajowa Izba Rozliczeniowa Szafir SDK · Not Using 'Economy of Mechanism'

Affects Krajowa Izba Rozliczeniowa Szafir SDKSource CVE Database V5

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Not known to be exploited · CVSS 9.3 Critical : upgrade to 1.8.463.2 as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.8.463.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 May 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 29 Oct 2026.

What to do

Upgrade Krajowa Izba Rozliczeniowa Szafir SDK to 1.8.463.2.

Affected software

ProductAffectedFixed in
Krajowa Izba RozliczeniowaSzafir SDKAffected
  • <1.8.463.2
Fixed in
  • 1.8.463.2

AI-suggested

A fix is available in Szafir SDK version 1.8.463.2. Users and integrators should upgrade to this version to remediate the vulnerability. No other mitigation guidance is provided or required as the issue is resolved by the official fix.

Description

For untrusted certificates that contain the "Authority Information Access - caIssuers URI" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a "nonqualified" certificate. In such a case, Szafir SDK returns a success status code of 0 ("Positively verified") upon successful cryptographic verification and a certificate status of "nonqualified". For other types of untrusted certificates, Szafir SDK returns a success status code of 0 ("Positively verified") upon successful cryptographic verification and a certificate status of "nondetermined". This may lead integrating applications to incorrectly treat the digital signature as valid despite an untrusted certificate chain. This flaw enables authentication bypass and user impersonation: (1) in use-cases other than qualified certificate authentication, or (2) if the qualified certificate authentication use-case is not correctly implemented by the integrating application. This issue was fixed in version 1.8.463.2.

References

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