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Fencer Vulns
high 7.5

CVE-2026-48815 json

sigstore-js: `certificateOIDs` verification constraints are silently dropped and never enforced

published 2026-07-01 4 mo ago modified 2026-10-24 15 d ago also GHSA-52v5-jr5w-gjxr , EUVD-2026-44494

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 4.1.1, the documented certificateOIDs option in sigstore.verify() is accepted by the public API but discarded before verification, so required certificate extension OIDs are never checked and applications relying on certificateOIDs to restrict which certificates may sign artifacts can accept unauthorized certificates. This issue is fixed in version 4.1.1.

Patch / fix

  • npm sigstore 4.1.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-48815 updated cvss 5.9

sigstore: Sigstore: Unauthorized certificates accepted due to ignored `certificateOIDs` verification option

  • Red Hat Exploit Intelligence sigstore 4.0.0
    affected: workaround, no fix available
  • Red Hat Connectivity Link 1 sigstore 4.0.0
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 ubi8/nodejs-22, ubi8/nodejs-24, ubi8/nodejs-22-minimal, ubi8/nodejs-24-minimal Red Hat Enterprise Linux 9 ubi9/nodejs-22, ubi9/nodejs-24, ubi9/nodejs-24-minimal Red Hat Enterprise Linux 10 ubi10/nodejs-22, ubi10/nodejs-22-minimal, ubi10/nodejs-24-minimal
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 sigstore 4.0.0
    affected: workaround, no fix available
  • Red Hat Exploit Intelligence exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 Red Hat Connectivity Link 1 rhcl-1/rhcl-console-plugin-rhel9 Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, ubi8/s2i-base, nodejs-nodemon, nodejs-full-i18n, +2 more Red Hat Enterprise Linux 9 npm, nodejs, nodejs-libs, ubi9/s2i-base, nodejs-full-i18n, ubi9/nodejs-22-minimal Red Hat Enterprise Linux 10 nodejs22, nodejs24, ubi10/s2i-base, ubi10/nodejs-24 Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9
    +3 more products
    Red Hat OpenShift Dev Spaces devspaces/udi-rhel9 Red Hat Satellite 6 sigstore 4.0.0, satellite/iop-remediations-rhel9 Red Hat Self-service automation portal 2 sigstore 4.0.0, ansible-automation-platform/bootc-automation-portal-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/sigstore/sigstore-js/security/advisories/GHSA-52v5-jr5w-gjxr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm sigstore
<4.1.1
4.1.1

Affected products

  • sigstore sigstore-js

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.