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CVE-2026-118775Proof of concept (PoC) published · CISA

Forge: ASN.1 OID first arc truncation in asn1.oidToDer

CVSS score

3.7

EPSS probability

—

Risk score

0.4

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Forge ASN.1 OID Arc Truncation Vulnerability in CVE-2026-118775

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A vulnerability in the Forge library stems from asn1.oidToDer() failing to range-check the first two arcs of an OID prior to version 1.4.1. This can cause an application encoding an untrusted OID string to emit DER representing a different, trusted OID.

Why does it matter?

This vulnerability can lead to integrity impacts where authorization mechanisms might be bypassed or manipulated through mismatched OID representations.

What should be done?

  • Upgrade the Forge package to version 1.4.1 or later
  • Follow vendor advisory recommendations
  • Review OID handling logic
Chain of evidence and sources2 verified claims

Forge kütüphanesinin 1.4.1 öncesi sürümlerinde asn1.oidToDer() fonksiyonu OID ilk yayını için aralık kontrolü yapmaz.

S0 · daybreach-canonicalS1 · cvelist

Güvenilmeyen bir OID girdisi kodlandığında farklı ve güvenilen bir OID'yi temsil eden DER çıktısı üretilebilir.

S0 · daybreach-canonicalS2 · nvd
Show the technical text from the sources

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, asn1.oidToDer() in lib/asn1.js did not range-check the first two arcs of an OID. An application that accepted an untrusted OID string, checked or authorized that string, and then encoded it with asn1.oidToDer() could emit DER representing a different, trusted OID from the one that was checked. DER parsing is not affected. This issue is fixed in version 1.4.1.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE: CWE-190

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-118775 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1digitalbazaarforge View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
3.7CVSS V3_1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NCVE CNA
3.7CVSS V31LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-118775 is associated with the following CWEs:

CWE-190: Integer Overflow or Wraparound

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-118775 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/digitalbazaar/forge/security/advisories/GHSA-4642-5mcj-2rqwvendor-advisoryhttps://github.com/digitalbazaar/forge/commit/e56a3dde8e4e63bae566bb32546eeaf92f515e1evendor-advisoryhttps://github.com/digitalbazaar/forge/releases/tag/v1.4.1vendor-advisory

CVSS Vector Radar Chart

3.7 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

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Weakness Type (CWE & CAPEC)

CWE-190

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CVE-2026-118775 · Forge: ASN.1 OID first arc truncation in…