CVE-2025-2529

Cache-write degradation via hash-flooding keys

Published Oct 15, 2025 · Updated Oct 16, 2025

Hash-flooding denial of service in IBM Terracotta 10.15.0 through Fix 23 and 11.1.0 through Fix 5 allows attackers to degrade cache writes. The Ehcache 3.x component accepts unfiltered, unsalted external values as cache keys, allowing colliding keys to degrade hash-table insertion performance. Exposure requires an application to use attacker-controlled values directly as cache keys; the bounded impact is slower cache writes rather than a reported crash.

CVSS severity3.7
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hash-flooding denial of service in IBM Terracotta 10.15.0 through Fix 23 and 11.1.0 through Fix 5 allows attackers to degrade cache writes. The Ehcache 3.x component accepts unfiltered, unsalted external values as cache keys, allowing colliding keys to degrade hash-table insertion performance. Exposure requires an application to use attacker-controlled values directly as cache keys; the bounded impact is slower cache writes rather than a reported crash.

The record

CVE
CVE-2025-2529
Published
Oct 15, 2025
Updated
Oct 16, 2025
Vendor
IBM
Product
Terracotta
Classifications
CWE-228, T1499.003
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=10.15.0 <=10.15.0 IF23
  2. Affected versionversion=11.1.0 <=11.1.0 IF5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · Terracottaversion=10.15.0 <=10.15.0 IF23; version=11.1.0 <=11.1.0 IF5

Published CVSS scores

3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
2.9IBM CorporationCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-228Improper Handling of Syntactically Invalid Structure
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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