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CVE-2026-118776low3.7

Forge: Incomplete PKCS#7 padding validation in AES/DES CBC and ECB decryption

Impact

Forge, a JavaScript TLS implementation, has a vulnerability in versions prior to 1.4.1, where incomplete PKCS#7 padding validation in AES/DES CBC and ECB decryption can lead to integrity failures. The issue arises from accepting malformed ciphertext with invalid padding. This can cause up to four plaintext blocks to be silently removed.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

digitalbazaar · GitHub_M

forge

1 range
GitHub_M version evidence

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affected

< 1.4.1

unaffected

unknown

Other versions: unknown

Original source description

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used decipher.finish(), CBC and ECB modes, PKCS#7 padding to process the relevant input or security decision. node-forge validated only the final byte of PKCS#7 padding during CBC and ECB decryption and accepted zero, oversized, or mismatched padding bytes. Malformed ciphertext could consequently be accepted and up to four plaintext blocks could be silently removed, causing an integrity failure in applications that treated successful decryption as proof of valid padding. This issue is fixed in version 1.4.1.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-118776

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-20 ↗

CWE-20: Improper Input Validation

GitHub_M

Related →
CWE-354 ↗

CWE-354: Improper Validation of Integrity Check Value

GitHub_M

Related →
Contributing organizations · 1
GitHub_M

Assigning organization

2026-10-29

What changed

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References

3 sources
github.com/digitalbazaar/forge/security/advisories/GHSA-2vgq-wchc-25w7
Security advisoryGitHub_M
github.com/digitalbazaar/forge/commit/81774ff99e2da64aec9a43591df45a360040c136
PatchGitHub_M
github.com/digitalbazaar/forge/releases/tag/v1.4.1
Release notesGitHub_M