Envoy Proxy 1.38 lifecycle
Current status
Envoy Proxy 1.38 is currently in standard support.
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
- standard support
- End of life
- 23 Apr 2027
- Latest release
- 1.38.4
- Released
- 26 Aug 2026
At a glance
- Version line
- 1.38
- Initial release
- 23 Apr 2026
- Lifecycle phase
- standard support
- Latest stable
- 1.38.4
- Latest release date
- 26 Aug 2026
- EOL
- 23 Apr 2027
- Until EOL
- ~8 months
- Risk
- low
- Releases tracked
- 5
Lifecycle timeline
Phases from published LifecyclePeriod records. Missing phases are not inferred.
Release
23 Apr 2026
standard supportcurrent
23 Apr 2026 → 23 Apr 2027
Source: Envoy RELEASES.md Policy
Envoy Proxy 1.38 is currently in standard support.
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 1.38
SupportedEOL 23 April 2027
Supported upgrade options
- Envoy Proxy 1.39Upgrade planner →SupportedEOL 14 July 2027· ~2 months more support· 1 minor version newer
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
Security
Advisories affecting Envoy Proxy 1.38 (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
- 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
Previous releases
1.38.3
23 Jun 2026
1.38.2
10 Jun 2026
1.38.1
4 Jun 2026
Release history
5 concrete releases tracked for this line.
Release activity
- Total releases
- 5
- Last 30 days
- 1
- Last 90 days
- 4
- Avg. interval
- ~31 days
- Most recent
- 26 Aug 2026
Should I use this version?
Suitable for new deployments
Envoy Proxy 1.38 is currently supported (standard support).
Version comparison
Compact comparison against the nearest relevant release lines.
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
- 5
- Lifecycle periods
- 1
- EOL
- Known
- Provenance records
- 2
- Data last checked
- 2 Sept 2026
- Latest source update
- 2 Sept 2026