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CVE-2026-56862VulnerabilityPublished

Red Hat Security Advisory: delve security, bug fix, and enhancement update

Affects Red Hat delve security,Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-56862· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in Red Hat package updates : patch Red Hat tls soon.

Data as of 11 Nov 2026, 01:51 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.27.0-rc.3, 1.26.6, 1.25.13
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Aug 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 10 Nov 2026.

What to do

Upgrade crypto/tls to 1.27.0-rc.3, 1.26.6 or 1.25.13.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/tlsAffected
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.27.0-rc.3
Go standard librarycrypto/tlsAffected
  • >=1.26.0-0 <1.26.6
Fixed in
  • 1.26.6
Go standard librarycrypto/tlsAffected
  • <1.25.13
Fixed in
  • 1.25.13
Gocrypto/tlspkg:golang/crypto/tlsOther threatsAffected
  • <1.25.13
  • >=1.26.0-0 <1.26.6
  • >=1.27.0-0 <1.27.0-rc.3
Fixed in
  • 1.25.13
  • 1.26.6
  • 1.27.0-rc.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an update to Delve version 1.27.2-2.el9_9 for Red Hat Enterprise Linux 9 that includes fixes for these vulnerabilities. Users should apply this update promptly to mitigate the risks. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory.

Description

This advisory addresses multiple security vulnerabilities in the Go programming language's crypto/tls and crypto/x509 packages, fixed in an update to the Delve debugger version 1.27 for Red Hat Enterprise Linux 9. The issues include denial of service via indefinite KeyUpdate messages and multiple ECH outer extension references, as well as man-in-the-middle attacks via untrusted intermediate certificates. The update mitigates these vulnerabilities by incorporating fixes in the underlying Go libraries used by Delve.

References

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