Caddy 2.3 lifecycle

Current status

end of lifehigh

Caddy 2.3 reached end of life on 10 May 2021. Security and bug fixes are no longer provided by the project according to published lifecycle data.

This line is end of life.

Plan your upgrade →

Security: 8 tracked advisories affecting this line · 1 in CISA KEV. Details below — lifecycle and vulnerability status are separate.

Official lifecycle source: Caddy GitHub Releases

Support phase: end of life
End of life: 10 May 2021
Latest release: 2.3.0
Released: 1 Jan 2021

At a glance

Version line: 2.3
Initial release: 1 Jan 2021
Lifecycle phase: end of life
Latest stable: 2.3.0
Latest release date: 1 Jan 2021
EOL: 10 May 2021
Risk: high
Releases tracked: 1

Lifecycle timeline

Phases from published LifecyclePeriod records. Missing phases are not inferred.

Release
1 Jan 2021
standard support
1 Jan 2021 → 10 May 2021
Source: Caddy GitHub Releases
end of lifecurrent
10 May 2021 → —
Source: Caddy GitHub Releases

Caddy 2.3 reached end of life on 10 May 2021. Security and bug fixes are no longer provided by the project according to published lifecycle data.

Upgrade options

Newer supported Caddy version lines from CompatHub lifecycle data. Compatibility and security context use existing evidence only.

You are on Caddy 2.3

End of lifeEOL 10 May 2021

Supported upgrade options

Caddy 2.11
Supported· 8 minor versions newer
Upgrade planner →

Open full upgrade planner for Caddy 2.3 →

Known exploited vulnerabilities

CVE entries that CISA lists in the Known Exploited Vulnerabilities catalogue, including due dates and ransomware use when published. CVSS shown when NVD enrichment is available.

CVE-2023-44487Known exploited
HTTP/2 Rapid Reset Attack Vulnerability
CISA KEV:
listed · added 2023-10-10 · due 2023-10-31
Required action:
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVSS:
7.5 (high) · NVD
CWE:
CWE-400
Affected:
<=2.427; <4.2.2; <3.4.2; <4.1.100; <2.5.0; <10.5.3; <9.4.0; <2.7.5
Fixed in:
4.2.2, 3.4.2, 4.1.100, 2.5.0, 10.5.3, 9.4.0, 2.7.5
Source:
CISA KEV · Advisory

Security

Advisories affecting Caddy 2.3 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.

Known vulnerabilities: 8
Known exploited: 1
Highest CVSS: 7.5

CVE-2023-44487Known exploited
HTTP/2 Rapid Reset Attack Vulnerability
CISA KEV:
listed · added 2023-10-10 · due 2023-10-31
Required action:
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVSS:
7.5 (high) · NVD
CWE:
CWE-400
Affected:
<=2.427; <4.2.2; <3.4.2; <4.1.100; <2.5.0; <10.5.3; <9.4.0; <2.7.5
Fixed in:
4.2.2, 3.4.2, 4.1.100, 2.5.0, 10.5.3, 9.4.0, 2.7.5
Source:
CISA KEV · Advisory
CVE-2026-52845
Caddy: FastCGI header normalization bypass in `forward_auth copy_headers`
Affected:
<2.11.4
Fixed in:
2.11.4
Source:
OSV source · Advisory
CVE-2026-52844
Caddy: Windows `file_server` path authorization bypass via encoded backslash
Affected:
<2.11.4
Fixed in:
2.11.4
Source:
OSV source · Advisory
CVE-2026-52846
Caddy: stripHTML template function bypass
Affected:
<2.11.4
Fixed in:
2.11.4
Source:
OSV source · Advisory
CVE-2026-27590
Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport
Affected:
<2.11.1
Fixed in:
2.11.1
Source:
OSV source · Advisory
CVE-2026-27589
Caddy vulnerable to cross-origin config application via local admin API /load (caddy)
Affected:
<2.11.1
Fixed in:
2.11.1
Source:
OSV source · Advisory
CVE-2026-27586
Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed
Affected:
<2.11.1
Fixed in:
2.11.1
Source:
OSV source · Advisory
CVE-2026-27585
Caddy's improper sanitization of glob characters in file matcher may lead to bypassing security protections
Affected:
<2.11.1
Fixed in:
2.11.1
Source:
OSV source · Advisory

Latest release

2.3.0

Released 1 Jan 2021 · stable

https://github.com/caddyserver/caddy/releases/tag/v2.3.0

Release history

1 concrete release tracked for this line.

Version	Release date	Channel	Source
2.3.0	1 Jan 2021	stable	Source

Release activity

Total releases: 1
Last 30 days: 0
Last 90 days: 0
Most recent: 1 Jan 2021

Should I use this version?

Not recommended for new deployments

Upgrade to a currently supported release line. Recommended target: Caddy 2.11.

Version comparison

Compact comparison against the nearest relevant release lines.

	2.3	2.11
Status	end of life	standard support
Latest release	2.3.0	2.11.4
EOL	May 2021	Not published
Risk	high	low

Sources

Where this information comes from.

Lifecycle sources

Caddy GitHub Releasesfirst party · high confidence
Official source: https://github.com/caddyserver/caddy/releases
Last verified 2 Sept 2026
Caddy go.mod Go Toolchainfirst party
Official source: https://github.com/caddyserver/caddy
Verification time not recorded
OSV.devfirst party
Official source: https://osv.dev
Verification time not recorded
NVD (NIST)first party
Official source: https://nvd.nist.gov
Verification time not recorded
CISA Known Exploited Vulnerabilitiesfirst party
Official source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Verification time not recorded

Release sources

Caddy GitHub Releasesfirst party · high confidence
Official source: https://github.com/caddyserver/caddy/releases
Last verified 2 Sept 2026

Data coverage

Last checked = last successful upstream check. Latest source update = when upstream content last changed.

Releases tracked: 1
Lifecycle periods: 2
EOL: Known
Provenance records: 3
Data last checked: 2 Sept 2026
Latest source update: 2 Sept 2026