CVE-2026-35189

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Source
https://cve.org/CVERecord?id=CVE-2026-35189
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35189.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-35189
Downstream
Published
2026-09-29T15:32:11Z
Modified
2026-09-30T08:06:04Z
Summary
Excessive Memory Allocation in Relative CRLDP Processing
Details

Issue summary: A certificate with many nameRelativeToCRLIssuer CRL distribution points causes disproportionate heap growth when OpenSSL caches X.509 extensions.

Impact summary: Receiving a crafted certificate from a malicious peer can lead to significant memory pressure and possible Denial of Service in clients or in servers that solicit client certificates.

CWE: CWE-770: Allocation of Resources Without Limits or Throttling

Description: A certificate or a set of certificates that fits under the limit for size of certificates accepted from the peer (~100 KiB) can result in allocation of several hundred MiB of resident memory on the receiving side during a normal TLS handshake. This may be enough to crash the client or server, if multiple concurrent connections lead to similarly large memory allocations.

The fix postpones processing of the CRL distribution points extensions in certificates to the time when the processed value is required for CRL processing. This avoids keeping large memory allocations for a long time when such certificates are received.

FIPS impact: no The affected code is outside the FIPS module boundary.

Database specific 
{
    "cna_assigner":  "openssl",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35189.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "4.0.0"
                },
                {
                    "fixed":  "4.0.3"
                },
                {
                    "introduced":  "3.6.0"
                },
                {
                    "fixed":  "3.6.5"
                },
                {
                    "introduced":  "3.5.0"
                },
                {
                    "fixed":  "3.5.9"
                },
                {
                    "introduced":  "3.4.0"
                },
                {
                    "fixed":  "3.4.8"
                },
                {
                    "introduced":  "3.0.0"
                },
                {
                    "fixed":  "3.0.23"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/openssl/openssl

Affected ranges

Type
GIT
Repo
https://github.com/openssl/openssl
Events
Introduced
e04bd3433fd84e1861bf258ea37928d9845e6a86
Fixed
e04bd3433fd84e1861bf258ea37928d9845e6a86
Introduced
e818b74be2170fbe957a07b0da4401c2b694b3b8
Fixed
e818b74be2170fbe957a07b0da4401c2b694b3b8
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "1.1.1"
        },
        {
            "fixed":  "1.1.1zj"
        },
        {
            "introduced":  "1.0.2"
        },
        {
            "fixed":  "1.0.2zs"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35189.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "28170854778703993674264004058177114599",
                "73132526844288570625317440636111911761",
                "177405411499435185068645597737938634778",
                "224809958623850711330610094965797758930",
                "295554444428855106393106961197201359586"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-35189-c377fa22",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/openssl/openssl/commit/e04bd3433fd84e1861bf258ea37928d9845e6a86",
        "target":  {
            "file":  "include/openssl/opensslv.h"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "251633914150035957322733061977107206211",
                "338514574181828579838011565939158652696",
                "76638288692106140328510055542557597351",
                "142922657400765574308962710386922248045",
                "71649992455794854055653842592139575350",
                "65527166711110472566013424527579064967",
                "253196866009476977787139000804413898733",
                "172177136897997206866313011107384691461"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-35189-e051451f",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/openssl/openssl/commit/e818b74be2170fbe957a07b0da4401c2b694b3b8",
        "target":  {
            "file":  "crypto/opensslv.h"
        }
    }
]
vanir_signatures_modified 
"2026-09-30T08:06:04Z"