How many CVEs have patched isUpgrade?

1 published CVEs changed isUpgrade in envoyproxy/envoy, in 3 distinct patches totalling 7 changed lines, between 2026 and 2026.

What is the latest CVE that changed isUpgrade?

CVE-2026-73548 (Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's shared backend pool), published 2026-09-21, changed lines 438 to 444 of source/common/router/upstream_request.cc.

How does isUpgrade compare to the rest of envoyproxy/envoy?

envoyproxy/envoy has 44 CVEs with a located fix in total; 1 of them changed isUpgrade.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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envoyproxy/envoy

Function

isUpgrade

Name: isUpgrade in envoyproxy/envoy: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

source/common/router/upstream_request.cc

Last patched September 21, 2026

1

CVEs

That changed this function

3

Distinct patches

Backports counted once

7

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

isUpgrade in envoyproxy/envoy was changed by 1 published CVE fixes in 2026, in 3 distinct patches that added or removed 7 lines in total.

envoyproxy/envoy has 44 CVEs with a located fix in total, so 2% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed isUpgrade, newest first, with the lines each fix touched.

Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's shared backend pool
CVE-2026-73548 · lines 438–444 · +7 −0
High · CVSS 7.5
EPSS 0.5%2026-09-21

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Other functions in these files

Functions in the same file that CVE fixes also changed.

Other hotspots in the repository

Functions in envoyproxy/envoy changed by the most CVE fixes.

MessageDone3 CVEs · source/common/http/http1/balsa_parser.cc decodeHeaders2 CVEs · source/common/http/conn_manager_impl.cc saw_downstream_reset_2 CVEs · source/common/http/filter_manager.h maybeEndDecode2 CVEs · source/common/http/filter_manager.cc bufferedData2 CVEs · source/common/http/filter_manager.cc sendProtocolError2 CVEs · source/common/http/http1/codec_impl.cc

All patched functions in envoyproxy/envoy

Frequently asked questions

Common questions about CVE fixes to isUpgrade.

How many CVEs have patched isUpgrade?: 1 published CVEs changed isUpgrade in envoyproxy/envoy, in 3 distinct patches totalling 7 changed lines, between 2026 and 2026.
What is the latest CVE that changed isUpgrade?: CVE-2026-73548 (Envoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's shared backend pool), published 2026-09-21, changed lines 438 to 444 of source/common/router/upstream_request.cc.
How does isUpgrade compare to the rest of envoyproxy/envoy?: envoyproxy/envoy has 44 CVEs with a located fix in total; 1 of them changed isUpgrade.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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