GHSA-H57C-V2V3-5V3V

Vulnerability from github – Published: 2026-04-23 00:31 – Updated: 2026-04-30 20:52
VLAI
Summary
verl's math_equal() Vulnerable to Arbitrary Code Execution via Unsafe eval()
Details

A vulnerability was identified in ByteDance verl up to 0.7.1. Affected is the function math_equal of the file prime_math/grader.py. The manipulation leads to a sandbox issue. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit is publicly available and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity
5.6 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
2.9 (Low)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "verl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-6878"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-95"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-30T20:52:35Z",
    "nvd_published_at": "2026-04-23T00:16:47Z",
    "severity": "LOW"
  },
  "details": "A vulnerability was identified in ByteDance verl up to 0.7.1. Affected is the function math_equal of the file prime_math/grader.py. The manipulation leads to a sandbox issue. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit is publicly available and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-h57c-v2v3-5v3v",
  "modified": "2026-04-30T20:52:35Z",
  "published": "2026-04-23T00:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6878"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/verl-project/verl"
    },
    {
      "type": "WEB",
      "url": "https://github.com/verl-project/verl/blob/v0.7.1/verl/utils/reward_score/prime_math/grader.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/795257"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/359040"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/359040/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "verl\u0027s math_equal() Vulnerable to Arbitrary Code Execution via Unsafe eval()"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.