CVE-2023-33202

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 43% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

Bouncy Castle for Java before 1.73 contains a potential Denial of Service (DoS) issue within the Bouncy Castle org.bouncycastle.openssl.PEMParser class. This class parses OpenSSL PEM encoded streams containing X.509 certificates, PKCS8 encoded keys, and PKCS7 objects. Parsing a file that has crafted ASN.1 data through the PEMParser causes an OutOfMemoryError, which can enable a denial of service attack. (For users of the FIPS Java API: BC-FJA 1.0.2.3 and earlier are affected; BC-FJA 1.0.2.4 is fixed.)

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
—
EPSS
57.0%
KEV
Not listed

Published

November 23, 2023

Last Modified

August 18, 2025

References (7)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2024-05-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 1 ecosystem)
Maven(9)
PackageVulnerable rangeFixed inDependents
org.bouncycastle:bcpkix-jdk18on1.71, 1.71.1, 1.721.73—
org.bouncycastle:bcprov-ext-jdk15on1.46 ... 1.70 (25 versions)1.73—
org.bouncycastle:bcprov-ext-jdk161.45, 1.461.73—
org.bouncycastle:bcprov-jdk141.38 ... 1.72 (29 versions)1.73—
org.bouncycastle:bcprov-jdk151.32 ... 1.46 (7 versions)1.73—
org.bouncycastle:bcprov-jdk15on1.46 ... 1.70 (26 versions)——
org.bouncycastle:bcprov-jdk15to181.63 ... 1.72 (10 versions)1.73—
org.bouncycastle:bcprov-jdk161.38 ... 1.46 (6 versions)1.73—
org.bouncycastle:bcprov-jdk18on1.71, 1.71.1, 1.721.73—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 52× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-07-22 23:10 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-33202?
CVE-2023-33202 is a medium vulnerability published on November 23, 2023. Bouncy Castle for Java before 1.73 contains a potential Denial of Service (DoS) issue within the Bouncy Castle org.bouncycastle.openssl.PEMParser class. This class parses OpenSSL PEM encoded streams containing X.509 certificates, PKCS8 encoded keys, and PKCS7 objects. Parsing a file that has…
When was CVE-2023-33202 disclosed?
CVE-2023-33202 was first published in the National Vulnerability Database on November 23, 2023, with the most recent update on August 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-33202 actively exploited?
CVE-2023-33202 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-33202?
CVE-2023-33202 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-33202?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-33202, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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