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Fencer Vulns
medium 6.5

CVE-2026-97629 json

NGINX ngx_http_ssl_module vulnerability

published 2026-10-14 25 d ago modified 2026-10-29 10 d ago also BIT-nginx-2026-97629 , BIT-nginx-gateway-2026-97629 , EUVD-2026-101113

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

Description When NGINX Plus or NGINX Open Source is configured with ssl_session_cache

shared:name:size

without an explicit ssl_session_ticket_key file directives to automatically rotate SSL session ticket keys, a remote unauthenticated attacker is able to forge client SSL sessions

in a non-deterministic manner that is beyond the attacker's control. An attacker could leverage this vulnerability to bypass verification of client certificates.

Impact

This vulnerability can lead to the exposure of resources or functionality to unintended actors, possibly providing attackers with access to sensitive information. There is no control plane exposure; this is a data plane issue only.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Patch / fix

  • bitnami nginx 1.30.6, 1.31.7
  • bitnami nginx-gateway 2.2.1
  • F5 NGINX Plus 37.0.5.1, 37.1.0.1
  • F5 NGINX Open Source 1.30.6, 1.31.7
  • nginx Debian 13 1.26.3-3+deb13u10
  • nginx Debian 14 1.30.4-8

debian advisories DEBIAN-CVE-2026-97629

  • nginx Ubuntu 24.04 LTS 1.24.0-2ubuntu7.19
  • nginx Ubuntu 26.10 1.30.4-7ubuntu1.1
  • nginx Ubuntu 26.04 LTS 1.28.3-2ubuntu1.12

ubuntu advisories UBUNTU-CVE-2026-97629

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx hummingbird 1 1.30.6-1.hum1
  • nginx-core hummingbird 1 1.30.6-1.hum1
  • nginx-mod-mail hummingbird 1 1.30.6-1.hum1
  • nginx-filesystem hummingbird 1 1.30.6-1.hum1
  • nginx-mod-stream hummingbird 1 1.30.6-1.hum1
  • nginx-all-modules hummingbird 1 1.30.6-1.hum1
  • nginx-mod-http-perl hummingbird 1 1.30.6-1.hum1
  • nginx-mod-http-geoip hummingbird 1 1.30.6-1.hum1

red hat advisories RHSA-2026:83427

  • nginx openSUSE Tumbleweed 1.31.7-1.1

opensuse advisories openSUSE-SU-2026:12143-1

  • nginx Alpine 3.24 1.30.6-r0

alpine advisories ALPINE-CVE-2026-97629

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx Azure Linux 3.0 1.30.6-1

azure linux advisories AZL-108458

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-97629 updated cvss 6.5

nginx: nginx: Client certificate verification bypass via forged SSL sessions

  • Red Hat Enterprise Linux 8 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +2 more Red Hat Enterprise Linux 9 nginx, nginx-core, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, +3 more Red Hat Enterprise Linux 10 nginx
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images nginx 1.30.6-1.hum1, nginx-core 1.30.6-1.hum1, nginx-mod-mail 1.30.6-1.hum1, nginx-filesystem 1.30.6-1.hum1, nginx-mod-stream 1.30.6-1.hum1, nginx-all-modules 1.30.6-1.hum1, +5 more
    fixed: vendor fix RHSA-2026:83427
  • Red Hat Enterprise Linux 9 nginx, nginx-core, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, +3 more
    not affected: vulnerable code not present
  • Red Hat Hardened Images php 8.5.11-2.1.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
24 d ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
bitnami nginx
>=0.1.29, <1.30.6
>=1.31.0, <1.31.7
1.30.6
1.31.7
bitnami nginx-gateway
>=0.1.29, <2.2.1
2.2.1

Affected products

  • F5 NGINX Plus
  • F5 NGINX Open Source

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.