Skip to main content
CVE-2026-78667VulnerabilityPublished

Red Hat Security Advisory: opentelemetry-collector security update

Affects Red Hat opentelemetry-collectorSource GCVE Database

0
Compare

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 2 Nov 2026, 21:15 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.27.2, 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 2 Nov 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 the OpenTelemetry Collector as part of Red Hat Enterprise Linux 10.2 Extended Update Support. Users should apply these official security updates promptly to remediate the identified vulnerabilities. Detailed update instructions are available in the Red Hat advisory 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 have been identified in the Red Hat build of OpenTelemetry Collector. These issues stem from flaws in Go language components such as net/http, crypto/tls, net/textproto, and crypto/x509. The vulnerabilities allow 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 is possible due to untrusted intermediate certificates in crypto/x509. Red Hat has released security updates addressing these issues for Red Hat Enterprise Linux 10.2 Extended Update Support and related variants.

References

Community reviews

Loading reviews…