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CVE-2026-27137VulnerabilityPublished Updated

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

Affects Red Hat delve security,Source GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2026-27137· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat x509 to 1.26.1 soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.26.1
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 6 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade crypto/x509 to 1.26.1.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.26.0-0 <1.26.1
Fixed in
  • 1.26.1
Gocrypto/x509pkg:golang/crypto/x509Other threatsAffected
  • >=1.26.0-0 <1.26.1
Fixed in
  • 1.26.1

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

Description

Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you're using a debugger, things aren't going your way. With that in mind, Delve should stay out of your way as much as possible. Security Fix(es): * net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811) * crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145) Bug Fix(es) and Enhancement(s): * Update Delve to 1.26 [rhel-10.0.z] (JIRA:RHEL-213072) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

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