GHSA-wjxj-5m7g-mg7q: org.bouncycastle:bcprov-ext-jdk16 (CVE-2023-33202)

Bouncy Castle Denial of Service (DoS)

CVSS 5.5 MediumEPSS 0.0100 · 63rd percentile

Published by the GitHub Advisory Database at 23 Nov 2023, 18:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
org.bouncycastle:bcprov-ext-jdk16	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk14	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk15	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk15to18	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk16	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk15on	Maven	all versions	No fixed version yet
org.bouncycastle:bcpkix-jdk18on	Maven	<1.73	1.73
org.bouncycastle:bcprov-ext-jdk15on	Maven	<1.73	1.73
org.bouncycastle:bcprov-jdk18on	Maven	<1.73	1.73

Identifiers

GHSA-wjxj-5m7g-mg7q · CVE-2023-33202

Weakness (CWE)

CWE-400

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Bouncy Castle for Java versions before 1.73 are affected, and bcprov-jdk15on is listed as affected in all versions with no fixed version. Parsing a file containing crafted ASN.1 data with the PEMParser class causes an OutOfMemoryError, which can enable a denial of service. Upgrade the affected packages to 1.73; no fix is listed for bcprov-jdk15on.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.5	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS 0.0100, the 63rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:18 UTC First seen by agentprime
31 Oct 2026, 14:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.