Vulnerability-Lookup

GHSA-8J3X-M868-CPW8

Vulnerability from github – Published: 2026-06-30 21:25 – Updated: 2026-06-30 21:25

Summary

Open Babel has out-of-bounds write (overlapping memcpy) in zipstream basic_unzip_streambuf::underflow

Details

Summary

A memory-safety vulnerability in Open Babel's bundled zipstream decompression code caused an out-of-bounds write via overlapping memcpy when reading a crafted gzip-compressed chemistry file.

Details

The flaw was in basic_unzip_streambuf::underflow. The decompression buffer refill path invoked memcpy with overlapping source and destination regions, which is undefined behavior and produced out-of-bounds writes in practice. Any file format read through the gzip-wrapped reader was a potential trigger.

Impact

Open Babel is a C++ library and CLI used to read and write chemistry file formats; it is shipped by Linux distributions and embedded in services that may parse untrusted input. Triggering this vulnerability requires the victim to open a malicious gzip-compressed chemistry file with the obabel tool, the OBConversion API, or any of the language bindings (Python, Ruby, Java, R, Perl, C#, PHP).

Affected versions

All releases up to and including 3.1.1.

Patched version

3.2.0 (released 2026-05-26).

Patch

Fix commit: https://github.com/openbabel/openbabel/commit/d4621d41 Originally reported as #2832; fixes consolidated in #2913.

A minimized reproducer for this CVE is checked in under test/files/fuzz_regress/ and is exercised on every CI build under ASAN+UBSAN by the fuzzregresstest harness.

Credit

Reported via OSS-Fuzz.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

1.9 (Low)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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": "openbabel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-10995"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T21:25:25Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Summary\n\nA memory-safety vulnerability in Open Babel\u0027s bundled zipstream\ndecompression code caused an out-of-bounds write via overlapping\n`memcpy` when reading a crafted gzip-compressed chemistry file.\n\n### Details\n\nThe flaw was in `basic_unzip_streambuf::underflow`. The decompression\nbuffer refill path invoked `memcpy` with overlapping source and\ndestination regions, which is undefined behavior and produced\nout-of-bounds writes in practice. Any file format read through the\ngzip-wrapped reader was a potential trigger.\n\n### Impact\n\nOpen Babel is a C++ library and CLI used to read and write chemistry\nfile formats; it is shipped by Linux distributions and embedded in\nservices that may parse untrusted input. Triggering this vulnerability\nrequires the victim to open a malicious gzip-compressed chemistry file\nwith the `obabel` tool, the `OBConversion` API, or any of the language\nbindings (Python, Ruby, Java, R, Perl, C#, PHP).\n\n### Affected versions\n\nAll releases up to and including 3.1.1.\n\n### Patched version\n\n3.2.0 (released 2026-05-26).\n\n### Patch\n\nFix commit: https://github.com/openbabel/openbabel/commit/d4621d41\nOriginally reported as #2832; fixes consolidated in #2913.\n\nA minimized reproducer for this CVE is checked in under\n`test/files/fuzz_regress/` and is exercised on every CI build under\nASAN+UBSAN by the `fuzzregresstest` harness.\n\n### Credit\n\nReported via OSS-Fuzz.",
  "id": "GHSA-8j3x-m868-cpw8",
  "modified": "2026-06-30T21:25:25Z",
  "published": "2026-06-30T21:25:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openbabel/openbabel/security/advisories/GHSA-8j3x-m868-cpw8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-10995"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbabel/openbabel/issues/2832"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbabel/openbabel/issues/2913"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbabel/openbabel/commit/d4621d417c167b50cc8ce7aa3a02557e5b2b81c5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openbabel/openbabel"
    },
    {
      "type": "WEB",
      "url": "https://github.com/user-attachments/files/22318572/poc.zip"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.325923"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.325923"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.654059"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Open Babel has out-of-bounds write (overlapping memcpy) in zipstream basic_unzip_streambuf::underflow"
}

CVE-2025-10995 (GCVE-0-2025-10995)

Vulnerability from cvelistv5 – Published: 2025-09-26 02:02 – Updated: 2025-09-26 19:26

Title

Open Babel zipstreamimpl.h underflow memory corruption

Summary

A security vulnerability has been detected in Open Babel up to 3.1.1. This vulnerability affects the function zlib_stream::basic_unzip_streambuf::underflow in the library /src/zipstreamimpl.h. Such manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used.

Severity

4.8 (Medium)


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

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

5.3 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-119 - Memory Corruption

Assigner

VulDB

References

5 references

URL	Tags
https://vuldb.com/?id.325923	vdb-entrytechnical-description
https://vuldb.com/?ctiid.325923	signaturepermissions-required
https://vuldb.com/?submit.654059	third-party-advisory
https://github.com/openbabel/openbabel/issues/2832	issue-tracking
https://github.com/user-attachments/files/2231857…	exploit

Impacted products

1 product

Vendor	Product	Version
n/a	Open Babel	Affected: 3.1.0 Affected: 3.1.1

Credits

ahuo (VulDB User)

Show details on NVD website

JSON

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{
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          {
            "other": {
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                "id": "CVE-2025-10995",
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-26T19:26:33.743627Z",
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      "credits": [
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        }
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          "lang": "en",
          "value": "A security vulnerability has been detected in Open Babel up to 3.1.1. This vulnerability affects the function zlib_stream::basic_unzip_streambuf::underflow in the library /src/zipstreamimpl.h. Such manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used."
        },
        {
          "lang": "de",
          "value": "In Open Babel up to 3.1.1 ist eine Schwachstelle entdeckt worden. Betroffen ist die Funktion zlib_stream::basic_unzip_streambuf::underflow in der Bibliothek /src/zipstreamimpl.h. Durch die Manipulation mit unbekannten Daten kann eine memory corruption-Schwachstelle ausgenutzt werden. Der Angriff muss auf lokaler Ebene erfolgen. Der Exploit ist \u00f6ffentlich verf\u00fcgbar und k\u00f6nnte genutzt werden."
        }
      ],
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          "url": "https://vuldb.com/?ctiid.325923"
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          "name": "Submit #654059 | Open Babel 3.1.1 / master commit 889c3501 Memory Corruption",
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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.

Action not permitted

GHSA-8J3X-M868-CPW8

Summary

Details

Impact

Affected versions

Patched version

Patch

Credit

CVE-2025-10995 (GCVE-0-2025-10995)

Tags

Sightings

Nomenclature