CVE-2026-54499 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-54499HIGH

stanfordnlp stanza — Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   R  U  H  H  H    7.5   .0034   27.5     —

AFFECTED
  Product  Versions    Fixed
  stanza   < 1.12.2 –  —

TIMELINE
  Jun 15  Reserved by GitHub_M
  Jul 8   EXPLOIT PUBLISHED — CVE-2026-54499 (stanfordnlp stanza). Public exploit reference added.
  Jul 8   Published (CNA: GitHub_M)

CWE-502, CWE-676 · CNA: GitHub_M · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

Stanza is a Stanford NLP Python library for tokenization, sentence segmentation, NER, and parsing of many human languages. Prior to 1.12.2, Stanza model loaders such as stanza.models.common.pretrain.Pretrain.load() attempt torch.load(..., weights_only=True) but fall back to torch.load(..., weights_only=False) on attacker-controllable pickle.UnpicklingError, allowing a malicious .pt pretrain or model file to execute arbitrary pickle code when a Stanza NLP pipeline loads it. This issue is fixed in version 1.12.2.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 15, 2026	Reserved	Reserved by GitHub_M
July 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-54499 (stanfordnlp stanza). Public exploit reference added.
July 8, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
stanfordnlp	stanza	—	< 1.12.2	—

Weaknesses

CWE-502 · CWE-676

References (4)

https://github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8b7ad4 [Patch]
https://github.com/stanfordnlp/stanza/pull/1587 [Issue Tracking, Patch]
https://github.com/stanfordnlp/stanza/releases/tag/v1.12.2 [Release Notes]
https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-54499 at cve.org

Vendors: stanfordnlp

Weaknesses: CWE-502 · CWE-676

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-54499 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.