How severe is CVE-2025-9341?

No CVSS score has been assigned to CVE-2025-9341 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-9341?

CVE-2025-9341 affects the following packages: org.bouncycastle:bc-fips (Maven), org.bouncycastle:bctls-fips (Maven). Ecosystems affected: Maven.

How do I fix CVE-2025-9341?

Update org.bouncycastle:bc-fips to 2.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-9341 is resolved across your whole dependency graph.

How do I detect CVE-2025-9341 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.bouncycastle:bc-fips, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-9341 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2025-9341 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-9341 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-9341?

CVE-2025-9341 has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 5th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-9341?

CVE-2025-9341 is classified as Uncontrolled Resource Consumption (CWE-400). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-9341 published, and has it been updated?

CVE-2025-9341 was published on August 22, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2025-9341: bc-fips — Fixed in 2.1.1

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-9341.

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs5th percentile — riskier than 5% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected

☕org.bouncycastle:bc-fips☕org.bouncycastle:bctls-fips

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. Bouncy Castle for Java FIPS bc-fips on All (API modules), Legion of the Bouncy Castle Inc. Bouncy Castle for Java LTS bcprov-lts8on on All (API modules) allows Excessive Allocation. This vulnerability is associated with program files org/bouncycastle/crypto/fips/AESNativeCBC.Java, org/bouncycastle/crypto/engines/AESNativeCBC.Java.

This issue affects Bouncy Castle for Java FIPS: 2.1.0; Bouncy Castle for Java LTS: from 2.73.0 through 2.73.7.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.bouncycastle:bc-fips`	≥ 2.1.0&&< 2.1.1	2.1.1`org.bouncycastle:bc-fips:2.1.1`
☕Maven	`org.bouncycastle:bctls-fips`	≥ 2.73.7&&< 2.73.8	2.73.8`org.bouncycastle:bctls-fips:2.73.8`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.bouncycastle:bc-fips, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.bouncycastle:bc-fips to 2.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-9341 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. Bouncy Castle for Java FIPS bc-fips on All (API modules), Legion of the Bouncy Castle Inc. Bouncy Castle for Java LTS bcprov-lts8on on All (API modules) allows Excessive Allocation. This vulnerability is associated with program files org/bouncycastle/crypto/fips/AESNativeCBC.Java, org/bouncycastle/crypto/engines/AESNativeCBC.Java. This issue affects Bouncy Castle for Java FIPS: 2.1.0; Bouncy Castle for Java LTS: from 2.73.0 through 2.73.7.

O3 Security · Impact-Aware SCA

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CVE-2025-9341 — bc-fips