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NVD / CVE Program· CNA redhat

CVE-2026-3832: Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response

Noroxi assessment

Priority: Monitor (action score 14/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.80% (FIRST EPSS); higher than 56.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: gitlab.com/gnutls/gnutls gnutls 3.8.13; azl3 gnutls 3.8.3-11 on Azure Linux 3.0 3.8.3-11; azl3 gnutls 3.8.3-8 on Azure Linux 3.0 3.8.3-10.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to gitlab.com/gnutls/gnutls gnutls 3.8.13; azl3 gnutls 3.8.3-11 on Azure Linux 3.0 3.8.3-11; azl3 gnutls 3.8.3-8 on Azure Linux 3.0 3.8.3-10 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

LowCVSS 3.7 · v3.1—No exploit Fix available
Published
Apr 30, 2026
Updated
Oct 26, 2026
EPSS
0.8% · 56th percentile

Report tools

JSON

Action score

14

Monitor

Low priority for now.

CVSS
14 / 40 · 3.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
3.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnugnutls
redhathardened images
redhatopenshift container platform
redhatenterprise linux

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu gnutlsall versions
  • redhat enterprise linux10.0
  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat hardened imagesall versions
  • redhat openshift container platform4.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • gitlab.com/gnutls/gnutls gnutls

    • before 3.8.13affected · semver

  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17

    • 1791371080 and laternot affected · rpm
    • 1791371069 and laternot affected · rpm
    • 1791788287 and laternot affected · rpm
    • 1791970484 and laternot affected · rpm

  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18

    • 1791459707 and laternot affected · rpm
    • 1791459711 and laternot affected · rpm
    • 1791459759 and laternot affected · rpm
    • 1789029076 and laternot affected · rpm
    • 1791966259 and laternot affected · rpm

  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20

    • 1790598593 and laternot affected · rpm

  • Red Hat Red Hat Discovery 2

    • 1782159791 and laternot affected · rpm
    • 1782166952 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10

    • 0:3.8.10-4.el10_2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:3.8.9-9.el10_0.19 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • 0:3.8.10-4.el9_8 and laternot affected · rpm
    • 0:3.8.10-4.el9_8 and laternot affected · rpm

  • Red Hat Red Hat Hardened Images

    • 3.8.13-1.hum1 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.20gnutlsbefore 3.8.13-r03.8.13-r0
Debian:13gnutls28before 3.8.9-3+deb13u43.8.9-3+deb13u4
Debian:14gnutls28before 3.8.13-13.8.13-1
openSUSE:Tumbleweedgnutlsbefore 3.8.13-1.13.8.13-1.1
Red Hat:enterprise_linux_eus:10.0gnutlsbefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-c++before 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-c++-debuginfobefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-danebefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-dane-debuginfobefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-debuginfobefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-debugsourcebefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-develbefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-fipsbefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-utilsbefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux_eus:10.0gnutls-utils-debuginfobefore 0:3.8.9-9.el10_0.190:3.8.9-9.el10_0.19
Red Hat:enterprise_linux:10.2gnutlsbefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-c++before 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-c++-debuginfobefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-danebefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-dane-debuginfobefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-debuginfobefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-debugsourcebefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-develbefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2
Red Hat:enterprise_linux:10.2gnutls-fipsbefore 0:3.8.10-4.el10_20:3.8.10-4.el10_2

+22

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-5334Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attacker
    49Plan
  • CVE-2019-3829A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7.
    48Plan
  • CVE-2008-1948The _gnutls_server_name_recv_params function in lib/ext_server_name.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 does not properly c
    44Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-1584Apr 9, 2026 · Gnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binder
    30Monitor
  • ← EarlierCVE-2026-33845Apr 30, 2026 · Gnutls: gnutls: denial of service via dtls zero-length fragment
    37Monitor
  • Later →CVE-2026-3833Apr 30, 2026 · Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
gitlab.com/gnutls/gnutls gnutls3.8.13Vendor (CNA)
azl3 gnutls 3.8.3-11 on Azure Linux 3.03.8.3-11 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 gnutls 3.8.3-8 on Azure Linux 3.03.8.3-10 · CBL-Mariner ReleasesMicrosoft (MSRC)
alpine:gnutls3.8.13-r0 · Alpine:v3.20Package registry (OSV)
debian:gnutls283.8.9-3+deb13u4 · Debian:13Package registry (OSV)
opensuse:gnutls3.8.13-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:gnutls0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-c++0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-c++0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-c++-debuginfo0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-dane0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-dane0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-dane-debuginfo0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-debuginfo0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-debugsource0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-devel0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-devel0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-fips0:3.8.10-4.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:gnutls-fips0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-utils0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:gnutls-utils0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gnutls-utils-debuginfo0:3.8.10-4.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:mingw32-gnutls0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:mingw64-gnutls0:3.8.13-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
rocky linux:gnutls0:3.8.10-4.el9_8 · Rocky Linux:9Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-179 · Incorrect Behavior Order: Early Validation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (16 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records