How many CVEs have patched convertIPv4MappedIPv6ToIPv4?

2 published CVEs changed convertIPv4MappedIPv6ToIPv4 in honojs/hono, in 2 distinct patches totalling 26 changed lines, between 2026 and 2026.

What is the latest CVE that changed convertIPv4MappedIPv6ToIPv4?

CVE-2026-47674 (Hono: IP Restriction bypasses static deny rules for non-canonical IPv6), published 2026-05-28, changed lines 140 to 142 of src/middleware/ip-restriction/index.ts.

How does convertIPv4MappedIPv6ToIPv4 compare to the rest of honojs/hono?

honojs/hono has 39 CVEs with a located fix in total; 2 of them changed convertIPv4MappedIPv6ToIPv4.

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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ConvertIPv4MappedIPv6ToIPv4

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ConvertIPv4MappedIPv6ToIPv4

convertIPv4MappedIPv6ToIPv4 in honojs/hono: Patched by 2 CVEs

honojs/hono

Function

convertIPv4MappedIPv6ToIPv4

Name: convertIPv4MappedIPv6ToIPv4 in honojs/hono: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

src/middleware/ip-restriction/index.ts

Last patched May 28, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

convertIPv4MappedIPv6ToIPv4 in honojs/hono was changed by 2 published CVE fixes in 2026, in 2 distinct patches that added or removed 26 lines in total.

honojs/hono has 39 CVEs with a located fix in total, so 5% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed convertIPv4MappedIPv6ToIPv4, newest first, with the lines each fix touched.

Hono: IP Restriction bypasses static deny rules for non-canonical IPv6
CVE-2026-47674 · lines 140–142 · +3 −0
Medium · CVSS 5.3
EPSS 0.3%2026-05-28
Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses
CVE-2026-39409 · lines 109–131 · +19 −4
Medium · CVSS 6.3
EPSS 0.4%2026-04-08

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Functions in honojs/hono changed by the most CVE fixes.

renderChildren1 CVEs · src/jsx/context.ts raw1 CVEs · src/jsx/base.ts renderChildren1 CVEs · src/jsx/streaming.ts flat1 CVEs · src/jsx/components.ts convertFormDataToBodyData1 CVEs · src/utils/body.ts slice1 CVEs · src/utils/url.ts

All patched functions in honojs/hono

Frequently asked questions

Common questions about CVE fixes to convertIPv4MappedIPv6ToIPv4.

How many CVEs have patched convertIPv4MappedIPv6ToIPv4?: 2 published CVEs changed convertIPv4MappedIPv6ToIPv4 in honojs/hono, in 2 distinct patches totalling 26 changed lines, between 2026 and 2026.
What is the latest CVE that changed convertIPv4MappedIPv6ToIPv4?: CVE-2026-47674 (Hono: IP Restriction bypasses static deny rules for non-canonical IPv6), published 2026-05-28, changed lines 140 to 142 of src/middleware/ip-restriction/index.ts.
How does convertIPv4MappedIPv6ToIPv4 compare to the rest of honojs/hono?: honojs/hono has 39 CVEs with a located fix in total; 2 of them changed convertIPv4MappedIPv6ToIPv4.
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

src/middleware/ip-restriction/index.ts on GitHub (opens in a new tab)
All patched functions in honojs/hono
Patched functions directory

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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