CVE-2026-46600 (GCVE-0-2026-46600)

Vulnerability from cvelistv5 – Published: 2026-07-21 19:18 – Updated: 2026-08-14 15:46
VLAI
Title
Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage
Summary
Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 15:00 UTC
CWE
Assigner
Go
References
Impacted products
Vendor Product Version
Go standard library net Affected: 1.26.0-0 , < 1.26.6 (semver)
Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)
Create a notification for this product.
golang.org/x/net golang.org/x/net/dns/dnsmessage Affected: 0 , < 0.56.0 (semver)
Create a notification for this product.
Credits
Mundur (https://github.com/M0nd0R)
Show details on NVD website
To clipboard 

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              "userInteraction": "NONE",
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      "product_status:known_affected": "3",
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      "title": "golang.org/x/net/dns/dnsmessage: golang.org/x/net/dns/dnsmessage: Denial of Service via invalid DNS record parsing",
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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

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.