CVE-2026-48142: f5 dos Out-of-bounds Read
CVSS: 6.3v4.0MediumAnalyzed
AliasesALPINE-CVE-2026-48142UBUNTU-CVE-2026-48142DEBIAN-CVE-2026-48142CGA-24mw-xgcf-cqvrCGA-3vjm-5p38-w369CGA-4g44-g2jm-r9qrCGA-4x7m-6hqg-ffc4CGA-5xr7-68px-67h5CGA-656g-cv5r-65g4CGA-6vc7-qf82-4gc7CGA-7g9v-p9hv-gqcwCGA-897r-m849-43x5CGA-92cv-fm5j-956gCGA-9gfc-wqrh-pxfwCGA-9h7p-gc53-m6f8CGA-9qrq-293r-vg4pCGA-9r7p-cv2q-629wCGA-9rh9-6277-jhx8CGA-9rrx-m6x6-5p8mCGA-cfcm-r98v-gp2pCGA-cg9h-j3rf-qg9xCGA-fvrh-5xqg-g9p6CGA-gf58-7mcm-w8mgCGA-gqhg-j95g-qqh3CGA-hwh5-fcgw-5w77CGA-jq94-q7p7-c5g5CGA-m6mf-7p44-ww2cCGA-p59v-245c-xr8mCGA-p83m-pw9r-8499CGA-q863-w64c-3qhfCGA-qqf7-jp77-8qg2CGA-rh2j-7864-g96rCGA-rpc6-6jqj-c2cmCGA-rq5p-3g7m-gmxqCGA-v35f-wxp5-9947CGA-v6vg-rmp5-v438CGA-wv6g-cp2j-gjfhCGA-x6xh-x5pm-f69jCGA-xmcp-9wwc-q3r7CGA-xp44-4g53-7w5qCGA-xxj5-fg6r-r465CGA-56ph-mqxp-c9ppCGA-v22h-f9q2-rgwhCGA-v5pc-hcw9-hf6jCGA-vvj3-f2pg-3jfm
Published 17-06-2026Last modified 17-06-2026
Vulnerability summary
CVE-2026-48142 is a medium (CVSS 6.3) Out-of-bounds Read vulnerability in f5 dos. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.7% of scored vulnerabilities.
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)EPSS score
0.37%
0%100%
Low · -0.31 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 8Timeline
- 17-06-2026PublishedVulnerability first disclosed.
- 17-06-2026Last modifiedVulnerability information updated.
Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS metrics
10 scores · 7 sources · 2 versionsMedium 6.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:NSourcesAll 7 agree
- OSV · AlpineEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
- OSV · DebianEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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
- OSV · WolfiEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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
- OSV · ChainguardEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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
Medium 4.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:LSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS trend
Probability
0.37%
Chance of exploitation in the next 30 days
Percentile
30%
Versus all other CVEs
30-day change
-0.31 pp
From 0.68% on 19-09-2026
19-09-202619-10-2026
EPSS score0.37%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Chainguard21 products
- ingress-nginx-controller-1.15< 1.15.8-r0
- ingress-nginx-controller-fips-1.15< 1.15.8-r0
- nginx-mainline< 1.31.2-r0
- nginx-stable< 1.30.3-r0
- nginx-stable-config< 1.30.3-r0
Wolfi19 products
- ingress-nginx-controller-1.15< 1.15.8-r0
- nginx-mainline< 1.31.2-r0
- nginx-stable< 1.30.3-r0
- nginx-stable-config< 1.30.3-r0
- nginx-stable-config-compat< 1.30.3-r0
F57 products
- dos≥ 4.3.0, ≤ 4.7.0 | 4.9.0
- nginx gateway fabric≥ 1.3.0, ≤ 1.6.2 | ≥ 2.0.0, ≤ 2.6.3
- nginx ingress controller≥ 3.5.0, ≤ 3.7.2 | ≥ 4.0.0, ≤ 4.0.1 | ≥ 5.0.0, ≤ 5.5.0
- nginx_instance_manager≥ 2.17.0, ≤ 2.22.0
- nginx open source≥ 1.13.10, < 1.31.2 | ≥ 1.30.0, < 1.30.3 | ≥ 1.0.0, ≤ 1.30.2 | ≥ 1.31.0, ≤ 1.31.1
Alpine1 product
- nginx< 1.26.3-r2 | < 1.28.3-r4 | < 1.30.3-r0
Debian1 product
- nginx< 1.22.1-9+deb12u9 | < 1.26.3-3+deb13u7 | < 1.30.1-5
Ubuntu1 product
- nginxAll versions (No fix recorded) | < 1.18.0-6ubuntu14.16 | < 1.24.0-2ubuntu7.13 | < 1.28.0-6ubuntu1.8 | < 1.28.3-2ubuntu1.6
6 vendors · 50 products
