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CVE-2026-116587

CVE-2026-116587

waiting for further signalsZero needs more public information before it can validate it.

GHSA-mgcc-cww5-fp2q ↗EUVD-2026-110467 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−12dkevAttacks confirmed in the real world.
go:github.com/go-jose/go-jose/v4 <= 4.1.5; <= 3.0.5
fixed in 4.1.6
ETK-2026-1848Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:golang/github.com/go-jose/go-jose/v4
pkg:golang/github.com/go-jose/go-jose/v3
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6h 54msince last run
11mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org publication
trigger signal −12dpublic poc−12dcve.org publicationwaiting for further signals+0.0d
−10d
−5d

description

go-jose can consume excessive CPU while processing RSA keys in JWK data. An attacker may cause denial of service when an application accepts JWKs from untrusted sources, particularly on Go 1.24 or later.

mitigation

Upgrade github.com/go-jose/go-jose/v4 to version 4.1.6. For v3, avoid parsing untrusted JWKs or place strict input-access and resource limits around the parsing service; no fixed v3 version is recorded.

fixed in 4.1.6

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
–
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
11m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-26 21:12Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−12d
Δ to kevAttacks confirmed in the real world.
–

outcome

No artifact: an exploit or check was attempted but could not be produced at this moment.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-14 23:13Z
  2. 2026-10-14 23:13Z
  3. 2026-10-26 21:12Z

this entry in the feed

GET /api/v1/feed/CVE-2026-116587

{
  "etk_id": "ETK-2026-1848",
  "cve_id": "CVE-2026-116587",
  "display_id": "CVE-2026-116587",
  "ghsa_id": "GHSA-mgcc-cww5-fp2q",
  "euvd_id": "EUVD-2026-110467",
  "status": "published",
  "anchor_state": "anchored",
  "title": "CPU denial of service in go-jose JWK parsing",
  "summary": "go-jose can consume excessive CPU while processing RSA keys in JWK data. An attacker may cause denial of service when an application accepts JWKs from untrusted sources, particularly on Go 1.24 or later.",
  "mitigation": "Upgrade github.com/go-jose/go-jose/v4 to version 4.1.6. For v3, avoid parsing untrusted JWKs or place strict input-access and resource limits around the parsing service; no fixed v3 version is recorded.",
  "vendor": "go",
  "product": "go:github.com/go-jose/go-jose/v4",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 4.1.5"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "4.1.6"
      ],
      "package_name": "github.com/go-jose/go-jose/v4",
      "purl": "pkg:golang/github.com/go-jose/go-jose/v4"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 3.0.5"
      ],
      "ecosystem": "go",
      "fixed_versions": [],
      "package_name": "github.com/go-jose/go-jose/v3",
      "purl": "pkg:golang/github.com/go-jose/go-jose/v3"
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 11.2960318,
  "t0_at": "2026-10-26T21:12:21.326000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-10-14T23:13:08+00:00",
      "days": -11.916126458333334,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T21:12:21.326000+00:00",
      "url": "https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q"
    },
    "trigger_signal": {
      "at": "2026-10-14T23:13:08+00:00",
      "days": -11.916126458333334,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T21:12:21.326000+00:00",
      "url": "https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q"
    }
  }
}

Anchor corroborated by the cve.org commit 608b22177e5f.

published 2026-10-17 04:31Z
last change 2026-10-27 01:41Z

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