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CVE-2026-78667VulnerabilityPublished Updated

Red Hat Security Advisory: delve security update

Affects Red Hat delveSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-78667· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat http to 1.27.2 or 1.26.9 soon.

Data as of 29 Oct 2026, 08:15 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.27.2, 1.26.9
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 8 Oct 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 29 Oct 2026.

What to do

Upgrade net/http to 1.27.2 or 1.26.9.

Affected software

ProductAffectedFixed in
Go standard librarynet/httpAffected
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.27.2
Go standard librarynet/httpAffected
  • <1.26.9
Fixed in
  • 1.26.9
Gonet/httppkg:golang/net/httpOther threatsAffected
  • <1.26.9
  • >=1.27.0-0 <1.27.2
Fixed in
  • 1.26.9
  • 1.27.2

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 updated packages for Delve and related Go libraries in Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. Users should apply these official updates to remediate the vulnerabilities. For detailed update instructions, refer to the Red Hat advisory and article at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the provided patches.

Description

Multiple denial of service vulnerabilities and a man-in-the-middle vulnerability affecting the Go debugger Delve and related Go libraries have been addressed in a Red Hat security update. These issues include denial of service via crafted HTTP Range headers, excessive HTTP/2 SETTINGS frames, memory limit bypass in multipart form parsing, and multiple ECH outer extension references. Additionally, a man-in-the-middle attack vector via untrusted intermediate certificates in crypto/x509 is fixed. The update is rated as important by Red Hat and applies to Red Hat Enterprise Linux 9.6 Extended Update Support and related variants.

References

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