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CVE

CVE-2026-1642

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers.
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CVE

CVE-2026-1642

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers.

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://my.f5.com/manage/s/article/K000159824, http://www.openwall.com/lists/oss-security/2026/02/05/1

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00016%
EPSS Percentile
0.03922%
Introduced Version
235f409907fd60eb2d8f6ecdc0e5cb163dd6d45f,8dfabca757830d0821e86206c2db83044e6696f0,0
Fix Available
1f57d8dc9d386b46ba7e156e25345b70843e7f55,a93bb1d70431faf564819218fe65b2d79962eb6c,1:1.24.0-2.module+el8.10.0+24013+f603d2af,1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1,2:1.20.1-24.el9_7.1,2:1.26.3-2.module+el9.7.0+24008+f3da7534,1.22.1-9+deb12u4,1.26.3-3+deb13u2,0:1.24.0-2ubuntu7.6,0:1.18.0-6ubuntu14.8,1.28.2-r0,2:1.20.1-24.0.1.el9_7.1,2:1.26.3-2.0.1.module+el9.7.0+90839+78c19072,1:1.24.0-5.0.1.module+el9.7.0+90821+c4114bda.1,1:1.24.0-2.0.1.module+el8.10.0+90849+dcad285b,1:1.28.2-1.amzn2.0.1,1:1.28.2-1.amzn2023.0.1

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