# SSH daemon allocates unbounded idle session channels, bypassing max_channels

CVE record · `CVE-2026-68956`

- **Identifiers:** `CVE-2026-68956`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** EEF
- **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Technologies:** [Erlang OTP](https://agentprime.io/advisories/technology/erlang-otp.md)
- **Published:** 22 Sept 2026
- **Updated:** 24 Sept 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: EEF) at 22 Sept 2026, 08:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Erlang. Product: OTP.
  - affected: `18.1.2 to before *` (otp)
  - Other versions: unknown
  - Package name: `otp`
  - purl: `pkg:software-id/erlang.org/otp`
- Vendor: Erlang. Product: OTP.
  - affected: `4.1.1 to before *` (otp)
  - Other versions: unknown
  - Package name: `ssh`
  - purl: `pkg:otp/ssh`
- Vendor: Erlang. Product: OTP.
  - affected: `84df3d4d0278e21a36a453bfee94799f0df67c2a to before *` (git)
  - unaffected: `79c2d2be17d902c5f53969b5806b725efda831be to before *` (git)
  - unaffected: `e18100975f0e5a8d59d02de00df12247a91b443b to before *` (git)
  - unaffected: `e2bbad0107bba41491a4d549686fd023db8740da to before *` (git)
  - Other versions: unknown
  - Package name: `erlang/otp`
  - Collection: `https://github.com`
  - purl: `pkg:github/erlang/otp`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.1 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`, from CNA (EEF)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0038, the 31st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 22 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-68956](https://www.cve.org/CVERecord?id=CVE-2026-68956)
- [NVD: CVE-2026-68956](https://nvd.nist.gov/vuln/detail/CVE-2026-68956)

### References from the CNA

- <https://github.com/erlang/otp/security/advisories/GHSA-qhcm-px9c-rvfh> (related, vendor-advisory)
- <https://cna.erlef.org/cves/CVE-2026-68956.html> (related)
- <https://osv.dev/vulnerability/EEF-CVE-2026-68956> (related)
- <https://www.erlang.org/doc/system/versions.html#order-of-versions> (version-scheme)
- <https://github.com/erlang/otp/commit/84df3d4d0278e21a36a453bfee94799f0df67c2a> (related)
- <https://github.com/erlang/otp/commit/79c2d2be17d902c5f53969b5806b725efda831be> (patch)
- <https://github.com/erlang/otp/commit/e18100975f0e5a8d59d02de00df12247a91b443b> (patch)
- <https://github.com/erlang/otp/commit/e2bbad0107bba41491a4d549686fd023db8740da> (patch)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-68956>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-68956/>. Everything for agents: <https://agentprime.io/llms.txt>.