Envoy Proxy 1.33 lifecycle

Current status

end of lifehigh

Envoy Proxy 1.33 reached end of life on 14 Jan 2026. 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: 2 tracked advisories affecting this line · 1 in CISA KEV. Details below — lifecycle and vulnerability status are separate.

Official lifecycle source: Envoy RELEASES.md Policy

Support phase: end of life
End of life: 14 Jan 2026
Latest release: 1.33.14
Released: 10 Dec 2025

At a glance

Version line: 1.33
Initial release: 14 Jan 2025
Lifecycle phase: end of life
Latest stable: 1.33.14
Latest release date: 10 Dec 2025
EOL: 14 Jan 2026
Risk: high
Releases tracked: 15

Lifecycle timeline

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

Release
14 Jan 2025
standard support
14 Jan 2025 → 14 Jan 2026
Source: Envoy RELEASES.md Policy
end of lifecurrent
14 Jan 2026 → —
Source: Envoy RELEASES.md Policy

Envoy Proxy 1.33 reached end of life on 14 Jan 2026. Security and bug fixes are no longer provided by the project according to published lifecycle data.

Upgrade options

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

You are on Envoy Proxy 1.33

End of lifeEOL 14 January 2026

Supported upgrade options

Envoy Proxy 1.39
SupportedEOL 14 July 2027· ~18 months more support· 6 minor versions newer
Upgrade planner →
Envoy Proxy 1.38
SupportedEOL 23 April 2027· ~15 months more support· 5 minor versions newer
Upgrade planner →
Envoy Proxy 1.37
SupportedEOL 13 January 2027· ~11 months more support· 4 minor versions newer
Upgrade planner →

Open full upgrade planner for Envoy Proxy 1.33 →

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:
<3.4.2; <10.5.3; <9.4.0; <2.7.5; <=2.427; <4.2.2; <4.1.100; <1.57.0; <2.5.0
Fixed in:
3.4.2, 10.5.3, 9.4.0, 2.7.5, 4.2.2, 4.1.100, 1.57.0, 2.5.0
Source:
CISA KEV · Advisory

Security

Advisories affecting Envoy Proxy 1.33 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.

Known vulnerabilities: 2
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:
<3.4.2; <10.5.3; <9.4.0; <2.7.5; <=2.427; <4.2.2; <4.1.100; <1.57.0; <2.5.0
Fixed in:
3.4.2, 10.5.3, 9.4.0, 2.7.5, 4.2.2, 4.1.100, 1.57.0, 2.5.0
Source:
CISA KEV · Advisory
CVE-2023-35945
Envoy vulnerable to HTTP/2 memory leak in nghttp2 codec
Affected:
<1.55.1
Fixed in:
1.55.1
Source:
OSV source · Advisory

Latest release

1.33.14

Released 10 Dec 2025 · stable

https://github.com/envoyproxy/envoy/releases/tag/v1.33.14

Previous releases

1.33.13
3 Dec 2025
1.33.12
17 Oct 2025
1.33.11
15 Oct 2025

Release history

15 concrete releases tracked for this line.

Version	Release date	Channel	Source
1.33.14	10 Dec 2025	stable	Source
1.33.13	3 Dec 2025	stable	Source
1.33.12	17 Oct 2025	stable	Source
1.33.11	15 Oct 2025	stable	Source
1.33.10	13 Oct 2025	stable	Source
1.33.9	5 Sept 2025	stable	Source
1.33.8	2 Sept 2025	stable	Source
1.33.7	19 Aug 2025	stable	Source
1.33.6	24 Jul 2025	stable	Source
1.33.5	18 Jul 2025	stable	Source
1.33.4	9 Jul 2025	stable	Source
1.33.3	7 May 2025	stable	Source
1.33.2	26 Mar 2025	stable	Source
1.33.1	21 Mar 2025	stable	Source
1.33.0	14 Jan 2025	stable	Source

Release activity

Total releases: 15
Last 30 days: 0
Last 90 days: 0
Avg. interval: ~24 days
Most recent: 10 Dec 2025

Should I use this version?

Not recommended for new deployments

Upgrade to a currently supported release line. Recommended target: Envoy Proxy 1.39.

Version comparison

Compact comparison against the nearest relevant release lines.

	1.33	1.39
Status	end of life	standard support
Latest release	1.33.14	1.39.1
EOL	Jan 2026	Jul 2027
Risk	high	low

Sources

Where this information comes from.

Lifecycle sources

Envoy RELEASES.md Policyfirst party · high confidence
Official source: https://raw.githubusercontent.com/envoyproxy/envoy/main/RELEASES.md
Last verified 2 Sept 2026
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

Envoy RELEASES.md Policyfirst party · high confidence
Official source: https://raw.githubusercontent.com/envoyproxy/envoy/main/RELEASES.md
Last verified 2 Sept 2026
Envoy GitHub Releasesfirst party
Official source: https://github.com/envoyproxy/envoy/releases
Verification time not recorded

Data coverage

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

Releases tracked: 15
Lifecycle periods: 2
EOL: Known
Provenance records: 3
Data last checked: 2 Sept 2026
Latest source update: 2 Sept 2026