4.8

CVE-2026-118777: Forge: Prototype Pollution in forge.http cookie handling via a malicious Set-Cookie

Undergoing analysis
AliasesGHSA-6wvx-3r32-xmcgUBUNTU-CVE-2026-118777CGA-3mgj-cj55-v93h
Published 29-10-2026Last modified 30-10-2026

Vulnerability summary

CVE-2026-118777 is a medium (CVSS 4.8) vulnerability in digitalbazaar forge. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 29-10-2026
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the forge.http client stored cookie names and paths from Set-Cookie response headers in ordinary JavaScript objects. A malicious server could use the cookie name __proto__ so that the attacker-controlled cookie path was written as a property on Object.prototype, or use inherited names such as constructor to modify Object. An empty cookie value could use the removal path to delete an inherited Object.prototype property. Applications using forge.http directly or through forge.xhr are affected; applications that do not use forge.http are unaffected. This issue is fixed in version 1.4.1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

30-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard19 products
  • arangodb-3.11All versions (No fix recorded) | < 3.11.14.6-r4
  • arangodb-3.12All versions (No fix recorded) | < 3.12.13-r1
  • dotstatsuite-supercoreAll versions (No fix recorded) | < 3.1.0_git20261022-r4
  • gitlab-rails-ce-18.10All versions (No fix recorded)
  • gitlab-rails-ce-18.8All versions (No fix recorded)
Digitalbazaar1 product
Npm1 product
  • node-forge< 1.4.1
Ubuntu1 product
  • node-node-forgeAll versions (No fix recorded)
Wolfi1 product
  • kubeflow-centraldashboardAll versions (No fix recorded) | < 2.0.0-r8

5 vendors · 23 products

References

8 links