CVE-2026-88648 (GCVE-0-2026-88648)

Vulnerability from cvelistv5 – Published: 2026-10-08 00:00 – Updated: 2026-10-08 18:53
VLAI
Summary
Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 27/100 over 2350 records in the last 180 days details
References
Show details on NVD website
To clipboard 

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    "datePublished": "2026-10-08T00:00:00.000Z",
    "dateReserved": "2026-09-10T00:00:00.000Z",
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        "metrics": {},
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88648.json",
      "version": "3"
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.