Security readout for executives and security teams
Plain-English summary
Szafir SDK can report a digital signature as positively verified even when its certificate chain is not trusted. Applications that rely on that result without correctly checking certificate status may accept an attacker-controlled identity, enabling authentication bypass or impersonation. The issue is fixed in version 1.8.463.2.
Executive priority
Treat internet-facing or identity-sensitive Szafir integrations as an immediate remediation priority because successful abuse could impersonate users without prior access. Upgrade promptly and verify application-level trust handling. Systems not using Szafir SDK are not indicated as affected by the supplied sources.
Technical view
For untrusted certificates, Szafir SDK may return status code 0 after cryptographic verification. With a caIssuers URI, it automatically downloads and imports the parent CA certificate as nonqualified; otherwise, status may be nondetermined. Integrations that interpret code 0 alone as trust can accept signatures lacking a trusted chain.
Likely exposure
Exposure is limited to applications integrating Szafir SDK and making authentication or trust decisions from its verification results. Risk is highest where code 0 is accepted without enforcing the returned certificate status. The bundle does not provide a complete affected-version range; it identifies 1.8.463.2 as fixed.
Exploitation context
The flaw is remotely reachable, requires no privileges or user interaction, and may enable authentication bypass or impersonation. The supplied record is not listed in KEV and provides no evidence of active exploitation. Practical impact depends on how each integrating application validates certificate qualification and trust.
Researcher notes
The core weakness is separation between successful signature mathematics and certificate trust. A status code of 0 does not necessarily establish a trusted signer. Review both caIssuers-driven certificate retrieval and handling of nonqualified or nondetermined statuses. The supplied metadata does not define the full vulnerable release range or document exploitation in the wild.
Mitigation direction
- Upgrade Szafir SDK to version 1.8.463.2 or later.
- Review vendor guidance before applying compensating controls.
- Require trusted certificate-chain and appropriate qualification status, not verification code 0 alone.
- Restrict affected authentication paths until upgraded if correct status enforcement cannot be confirmed.
Validation and detection
- Inventory applications and services that integrate Szafir SDK.
- Confirm the deployed SDK version is 1.8.463.2 or later.
- Review integration logic for explicit trusted-chain and certificate-status checks.
- Test that untrusted, nonqualified, and nondetermined certificates are rejected for authentication.
- Check logs for authentications accepted with nonqualified or nondetermined certificate status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-295: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-393: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-637: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9058 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——CERT-PLVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://cert.pl/posts/2026/05/CVE-2026-9058CVE reference, CERT-PL · third-party-advisory
- https://www.elektronicznypodpis.pl/CVE reference, CERT-PL · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.