e2b-dev/runtime

The runtime behind every E2B stack: Cloud, Enterprise, and your own machine.

Stars: 1.6k
Forks: 438
Open beginner issues: 0
Indexed issues: 107

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

107 open issues indexed

The Memory Oversubscription Gap: AgentEnv's Shared Page Cache Advantage vs E2B's Isolation-First Architecture Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

e2b-dev/runtime#3646 · 1 comment · Opened Sep 17, 2026
Local filesystem writes can retain stale tail data when overwriting shorter objects Open

Difficulty 3/5 1-2 days Newbie friendliness 86/100

e2b-dev/runtime#3642 · 2 comments · Opened Sep 16, 2026
Cancelled/timed-out sandbox create leaves an unregistered orphan instance on the node Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

e2b-dev/runtime#3637 · Opened Sep 14, 2026
DELETE on a paused sandbox can be undone by an in-flight resume: sandbox ends up running after DELETE returns 204 Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

e2b-dev/runtime#3636 · 2 comments · Opened Sep 13, 2026
Clarify denyOut semantics for sandbox-local MMDS (169.254.169.254) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

e2b-dev/runtime#3625 · 1 comment · Opened Sep 7, 2026
envd: distinguish expected stdin lifecycle errors from CodeInternal Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

e2b-dev/runtime#3622 · Opened Sep 7, 2026
Restore <pkg>-v<ver> git tags for per-component releases Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

e2b-dev/runtime#3620 · Opened Sep 6, 2026
[Bug]: flock() on a mounted volume hangs forever (mount is missing `nolock`) Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

e2b-dev/runtime#3619 · Opened Sep 4, 2026
Orchestrator GRPC_PORT takes 20-30 min to bind on startup when /run/netns has many residual ns-* from a previously drained node Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

e2b-dev/runtime#3615 · Opened Sep 3, 2026
Future plans for the public Firecracker fork / self-host source builds? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

e2b-dev/runtime#3612 · Opened Aug 31, 2026
bug(envd): HTTP listener bound after blocking init chain — connect-refused during startup race Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

e2b-dev/runtime#3610 · Opened Aug 31, 2026
bug(envd): rare startup race — MMDS poller keeps running but HTTP listener never binds (sandbox refuses :49983 instantly, orchestrator can't tell) Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

e2b-dev/runtime#3609 · 1 comment · Opened Aug 28, 2026
obs(api): Redis storage layer is missing key metrics across lock, transition, scan, and data-quality paths Open

Difficulty 4/5 3-5 days Newbie friendliness 64/100

e2b-dev/runtime#3607 · Opened Aug 24, 2026
obs(api): no metrics on global expiration ZSET size or evictor sweep latency Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

e2b-dev/runtime#3605 · Opened Aug 24, 2026
perf(api): cjson.decode in startTransitionScript Lua script blocks Redis event loop under concurrent evictions Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

e2b-dev/runtime#3602 · Opened Aug 24, 2026
Alpine template builds fail: glibc busybox in SyncChangesToDisk + missing /usr/bin/ionice and /usr/bin/nice Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

e2b-dev/runtime#3597 · Opened Aug 23, 2026
sandbox cache: StartRemoving state transition not broadcast, all allocations see stale Running state Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

e2b-dev/runtime#3595 · Opened Aug 22, 2026
perf(api): TeamItems causes O(allocations × team_size) Redis read bandwidth — extend existing pub/sub to maintain per-allocation sandbox cache Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

e2b-dev/runtime#3593 · Opened Aug 22, 2026
RFC: Evaluate replacing Redis with DragonflyDB as the caching backend Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

e2b-dev/runtime#3591 · Opened Aug 21, 2026
envd/port-forwarder: IPv6 wildcard (:::PORT) listeners silently ignored; dual-stack port key collision drops one socat Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

e2b-dev/runtime#3586 · Opened Aug 18, 2026
kernel: ipv6.disable=0 with no IPv6 routing causes Happy Eyeballs latency on all outbound sandbox connections Open

Difficulty 1/5 Under an hour Newbie friendliness 86/100

e2b-dev/runtime#3585 · Opened Aug 18, 2026
orchestrator: ResourceExhausted error messages don't include current vs max counts Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

e2b-dev/runtime#3583 · Opened Aug 18, 2026
fix(envd): malformed error message %!w(<nil>) when watch path is not a directory Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

e2b-dev/runtime#3581 · Opened Aug 17, 2026
fix(api): POST /sandboxes/{id}/connect accepts non-positive timeout values causing immediate termination Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

e2b-dev/runtime#3579 · Opened Aug 17, 2026
fix(api): isRetryableError in volume_util.go does not recognize gRPC codes.Unavailable and codes.DeadlineExceeded Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

e2b-dev/runtime#3577 · Opened Aug 17, 2026
fix(api): GetSandboxesSandboxID omits VolumeMounts and sets empty string Alias for paused sandboxes Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

e2b-dev/runtime#3575 · Opened Aug 17, 2026
fix(api): PostTemplatesTags queries database and begins transaction before team ownership check (tag enumeration oracle) Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

e2b-dev/runtime#3573 · Opened Aug 17, 2026
sandbox/storage: stale team-index SET entries accumulate when sandbox keys are lost without going through Remove() Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

e2b-dev/runtime#3566 · Opened Aug 14, 2026
bug(envd): PostInit reads request body with io.ReadAll and no size limit, enabling OOM via oversized payload Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

e2b-dev/runtime#3563 · Opened Aug 13, 2026
bug(envd/auth): expiration check after ConstantTimeCompare leaks timing oracle in validateSigning Open

Difficulty 1/5 1-3 hours Newbie friendliness 84/100

e2b-dev/runtime#3561 · Opened Aug 13, 2026
bug(envd): PostInit spawns unbounded MMDS-poll goroutines — one per /init retry Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

e2b-dev/runtime#3559 · Opened Aug 13, 2026
bug(orchestrator): Cleanup.Add has TOCTOU race — cleanup functions silently dropped after Run() Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

e2b-dev/runtime#3557 · Opened Aug 13, 2026
nfsproxy: isolate file-handle caches by sandbox/mount point Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

e2b-dev/runtime#3555 · 1 comment · Opened Aug 10, 2026
api: "Failed to place sandbox" gives no diagnostic - expose why no node accepted the sandbox Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

e2b-dev/runtime#3553 · 1 comment · Opened Aug 9, 2026
nfsproxy: middleware chain hides CachingHandler and disables directory verifier caching Open

Difficulty 4/5 3-5 days Newbie friendliness 64/100

e2b-dev/runtime#3552 · 1 comment · Opened Aug 8, 2026
ci: pin third-party GitHub Actions to immutable commit SHAs Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

e2b-dev/runtime#3550 · Opened Aug 7, 2026
nfsproxy: hardcoded cacheLimit=1024 causes ESTALE errors on large npm/pip installs Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

e2b-dev/runtime#3548 · 1 comment · Opened Aug 7, 2026
orchestrator: no CLI to inspect active NBD devices; lsblk shows 4096 pre-allocated noise Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

e2b-dev/runtime#3546 · Opened Aug 7, 2026
[RFC] Node-local shared read-only memory pages for Firecracker sandboxes Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

e2b-dev/runtime#3545 · 1 comment · Opened Aug 7, 2026
RFC: NFSv4 support for the sandbox NFS proxy — plans and trade-offs Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

e2b-dev/runtime#3544 · Opened Aug 7, 2026
persistent volume: .nfs* orphan files leak storage when sandbox VMs are forcibly killed Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

e2b-dev/runtime#3532 · Opened Aug 4, 2026
fix(api): DELETE /sandboxes/{id} returns 500/404 with no structured log — root cause invisible Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

e2b-dev/runtime#3529 · Opened Aug 4, 2026
Template build: finalize phase silently discards build-layer writes to /etc/ssl/certs Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

e2b-dev/runtime#3518 · 1 comment · Opened Aug 1, 2026
fix(orchestrator): envd error responses truncated to 100 chars, hiding root cause in logs and error chain Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

e2b-dev/runtime#3480 · Opened Jul 31, 2026
feat(events): add requester IP and user-agent to sandbox.lifecycle.killed event Open

Difficulty 4/5 3-5 days Newbie friendliness 70/100

e2b-dev/runtime#3461 · Opened Jul 30, 2026
feat(api): Snapshot complete CRUD + enhanced SnapshotInfo Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

e2b-dev/runtime#3456 · Opened Jul 30, 2026
fix(api): add nil guard in volume mount response conversion Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

e2b-dev/runtime#3450 · Opened Jul 29, 2026
fix(shared): ConnectionLimiter retains zero-count map entries on Release (memory leak) Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

e2b-dev/runtime#3448 · Opened Jul 29, 2026
fix(shared): missing port range validation and broken errors.As match bypass proxy 400 Bad Request Open

Difficulty 3/5 1-2 days Newbie friendliness 78/100

e2b-dev/runtime#3430 · Opened Jul 28, 2026
RFC: Allow fork from paused sandbox and named snapshots for RL/agent training workloads Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

e2b-dev/runtime#3424 · Opened Jul 28, 2026

A short digest of beginner-friendly GitHub issues.