CVE-2026-86698Public exploitNetwork attack vectorHinoki check available

Private repository access via scope-bearing refresh tokens

Published Sep 22, 2026 · Updated Sep 22, 2026

Insufficient session expiration in Hex.pm Hexpm 2025-10-10 through 2026-09-21 allows remote authenticated users to retain private-package access. generate_refresh_token/4 copies repository scopes into a 30-day refresh JWT, while the CDN authorizes those claims without checking membership or token type. A retained token therefore reads packages and documentation for prior organizations after membership or session revocation, but grants no write access.

CVSS severity2.3
Low
EPSS probability0.43%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Insufficient session expiration in Hex.pm Hexpm 2025-10-10 through 2026-09-21 allows remote authenticated users to retain private-package access. generate_refresh_token/4 copies repository scopes into a 30-day refresh JWT, while the CDN authorizes those claims without checking membership or token type. A retained token therefore reads packages and documentation for prior organizations after membership or session revocation, but grants no write access.

The record

CVE
CVE-2026-86698
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Hex.pm
Product
Hexpm
Classifications
CWE-613, CAPEC-60, T1134.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2025-10-10 <2026-09-22
  2. Affected versionversion=650faa03af511e74c1b3b49ec12d35666b6984c4 <db58cf3a86c7639708ef52ff86de0b4f938e6360

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hex.pm · Hexpmversion=2025-10-10 <2026-09-22; version=650faa03af511e74c1b3b49ec12d35666b6984c4 <db58cf3a86c7639708ef52ff86de0b4f938e6360

Published CVSS scores

2.3EEFCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
CAPEC-60Reusing Session IDs (aka Session Replay)
T1134.001Access Token Manipulation: Token Impersonation/Theft

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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