CVE-2026-102514 (GCVE-0-2026-102514)

Vulnerability from cvelistv5 – Published: 2026-10-01 20:00 – Updated: 2026-10-01 20:24 X_Open Source
VLAI
Title
Out-of-bounds write in PeaZip PEA extractor allows code execution via a crafted .pea archive
Summary
Out-of-bounds Write (CWE-787) in the PEA archive extraction routine (pea.pas, unpea_procedure) of the first-party pea component in PeaZip 11.2.0 and earlier allows an attacker who convinces a victim to open or extract a crafted .pea archive to execute arbitrary code as the user running PeaZip. While decompressing a PCOMPRESS1 stream, the 32-bit compressed-block-size field of the first block (compsize) is read directly from the archive and used without validation as the length of a blockread into the fixed-size global buffers wbuf1/wbuf2 (1,114,112 bytes) and as the bound of the subsequent copy loop. The existing check "compsize > WBUFSIZE" is applied only to the size of each following block, so the first block escapes it; the same unvalidated value is also used to index wbuf1[compsize], an out-of-bounds read at an attacker-chosen offset. The copy loop additionally copies the requested length instead of the number of bytes actually read, and terminates on equality rather than on an upper bound. Because the project is built without range checking and no archive password, integrity tag or non-default configuration is required, the overflow overwrites adjacent global data; code execution was demonstrated by two independent researchers against the official Linux x86-64 and Windows x64 builds, and the denial-of-service and memory-corruption primitive is cross-platform (Windows, macOS, Linux, BSD).
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 20:24 UTC
CWE
References
Impacted products
Vendor Product Version
PeaZip PeaZip Affected: 0 , < 11.3.0 (semver)
Create a notification for this product.
Date Public
2026-08-27 00:00
Show details on NVD website

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                "technical-description"
              ],
              "url": "https://secur0.com/en/cna/cve-list/cve-2026-102514-out-of-bounds-write-in-peazip-pea-extractor"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eUpgrade to PeaZip 11.3.0 or higher, which validates the size of the first compressed block (commit \u003ccode\u003e90ddbae\u003c/code\u003e), copies the number of bytes actually read, and stops the block-reading loop when the address exceeds the expected value.\u003c/p\u003e"
                }
              ],
              "value": "Upgrade to PeaZip 11.3.0 or higher, which validates the size of the first compressed block (commit 90ddbae), copies the number of bytes actually read, and stops the block-reading loop when the address exceeds the expected value."
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "tags": [
            "x_open-source"
          ],
          "title": "Out-of-bounds write in PeaZip PEA extractor allows code execution via a crafted .pea archive",
          "x_generator": {
            "engine": "Vulnogram 1.0.5"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "4daa8cea-433a-44bd-9456-53b127fc289a",
        "assignerShortName": "Secur0",
        "cveId": "CVE-2026-102514",
        "datePublished": "2026-10-01T20:00:51.760Z",
        "dateReserved": "2026-09-29T11:56:57.709Z",
        "dateUpdated": "2026-10-01T20:24:18.718Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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