6.9

CVE-2026-95101: f5 nginx open source Encoding Error

CVSS: 6.9v4.0MediumAwaiting analysis
AliasesDEBIAN-CVE-2026-95101UBUNTU-CVE-2026-95101
Published 14-10-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-95101 is a medium (CVSS 6.9) Encoding Error vulnerability in f5 nginx open source. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 14.8% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.25%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12143-1

Timeline

  1. 14-10-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

Description NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with proxy_request_buffering on directive, an unauthenticated attacker may be able to inject data in the proxied request. Impact This vulnerability may allow remote attackers to inject data in the proxied request.  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.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202618-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

F52 products
  • nginx open source≥ 1.31.0, < 1.31.7 | ≥ 1.30.0, < 1.30.6 | ≥ 1.25.0 (No fix recorded)
  • nginx plus≥ 37.1.0, < 37.2.0.1 | ≥ 37.0.0, < 37.0.7.1 | ≥ R36 (No fix recorded) | ≥ R35 (No fix recorded) | ≥ R34 (No fix recorded) | ≥ R33 (No fix recorded)
Debian1 product
  • nginxAll versions (No fix recorded) | < 1.30.4-8
Ubuntu1 product
  • nginxAll versions (No fix recorded)

3 vendors · 4 products

References

4 links