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CVE-2026-3832

Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response

Products / packages gnutls · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 10.0 Extended Update Support · 11 more

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:35:33 UTC
redhat · CVSS:3.1 · 3.7
Assessment vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Severity

low3.7

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Exploit reference published

Source-linked evidence; not proof of attacks in the wild or independent validation.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

A flaw in gnutls may allow a remote attacker to bypass security by presenting a crafted OCSP response, potentially leading to acceptance of a revoked server certificate. The vulnerability affects gnutls versions less than 3.8.13. A logic error in processing multi-record OCSP responses is the cause.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Vendor not supplied · redhat

gnutls

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 3.8.13

semver versions

unaffected

unknown

Other versions: unaffected

Red Hat · redhat

Red Hat Enterprise Linux 10

1 range
redhat version evidence

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affected

unaffected

0:3.8.10-4.el10_2 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:10.2

Red Hat · redhat

Red Hat Enterprise Linux 10.0 Extended Update Support

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0:3.8.9-9.el10_0.19 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux_eus:10.0

Red Hat · redhat

Red Hat Enterprise Linux 9

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0:3.8.10-4.el9_8 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux:9::appstreamcpe:/o:redhat:enterprise_linux:9::baseos

Red Hat · redhat

Red Hat Enterprise Linux 9

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0:3.8.10-4.el9_8 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux:9::appstreamcpe:/o:redhat:enterprise_linux:9::baseos

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.17

1 range
redhat version evidence

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affected

unaffected

1791371080 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.17::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.17

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791371069 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.17::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.17

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791788287 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.17::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.17

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791970484 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.17::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.18

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791459707 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.18::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.18

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791459711 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.18::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.18

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791459759 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.18::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.18

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1789029076 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.18::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.18

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1791966259 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.18::el9

Red Hat · redhat

Cert Manager support for Red Hat OpenShift release 1.20

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1790598593 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:cert_manager:1.20::el9

Red Hat · redhat

Red Hat Discovery 2

1 range
redhat version evidence

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affected

unaffected

1782159791 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:discovery:2::el9

Red Hat · redhat

Red Hat Discovery 2

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1782166952 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:discovery:2::el9

Red Hat · redhat

Red Hat Hardened Images

1 range
redhat version evidence

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affected

unaffected

3.8.13-1.hum1 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:hummingbird:1

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1781525684 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1781525671 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1781525693 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1781525739 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1787241211 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1787135742 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Update Infrastructure 5

1 range
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

1787241260 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhui:5::el9

Red Hat · redhat

Red Hat Enterprise Linux 6

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_els:6

Red Hat · redhat

Red Hat Enterprise Linux 7

0 ranges
redhat version evidence

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_els:7

Red Hat · redhat

Red Hat Enterprise Linux 8

0 ranges
redhat version evidence

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affected

unaffected

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux:8

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: unknown

Product identifiers (CPE)cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges
redhat version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4
Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

redhat guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.

gitlab.com/gnutls/gnutls/-/issues/1801 ↗Attributed to CISA-ADP

Original source description

Read the full publisher description

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.

References

18 sources
access.redhat.com/errata/RHSA-2026:13274
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:20612
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:20613
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:26319
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:26409
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:29197
Vendor advisoryredhat
View 12 more references
access.redhat.com/errata/RHSA-2026:58981
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:72502
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82304
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82322
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82347
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82354
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82372
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82857
Vendor advisoryredhat
access.redhat.com/errata/RHSA-2026:82888
Vendor advisoryredhat
access.redhat.com/security/cve/CVE-2026-3832
Security advisoryredhat
bugzilla.redhat.com/show_bug.cgi
Source referenceredhat
gitlab.com/gnutls/gnutls/-/issues/1801
Public exploit referenceredhat · CISA-ADP

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-3832

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-179 ↗

Incorrect Behavior Order: Early Validation

redhat

Related →
Contributing organizations · 2
redhat

Assigning organization

2026-11-06
CISA-ADP

Additional data publisher

2026-05-18

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

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