CVE-2025-9232Out-of-bounds read in HTTP client no_proxy handling
Updated under an hour ago ()
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It affects OpenSSL and 22 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Issue summary: An application using the OpenSSL HTTP client API functions may trigger an out-of-bounds read if the 'no_proxy' environment variable is set and the host portion of the authority component of the HTTP URL is an IPv6 address. Impact summary: An out-of-bounds read can trigger a crash which leads to Denial of Service for an application. The OpenSSL HTTP client API functions can be used directly by applications but they are also used by the OCSP client functions and CMP (Certificate Management Protocol) client implementation in OpenSSL. However the URLs used by these implementations are unlikely to be controlled by an attacker. In this vulnerable code the out of bounds read can only trigger a crash. Furthermore the vulnerability requires an attacker-controlled URL to be passed from an application to the OpenSSL function and the user has to have a 'no_proxy' environment variable set. For the aforementioned reasons the issue was assessed as Low severity. The vulnerable code was introduced in the following patch releases: 3.0.16, 3.1.8, 3.2.4, 3.3.3, 3.4.0 and 3.5.0. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as the HTTP client implementation is outside the OpenSSL FIPS module boundary.
- CVSS
- 5.9 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- openssl
- NVD analysis
- Not yet received
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
OpenSSL OpenSSL openssl:openssl (from the name) | from 3.5.0 before 3.5.4; from 3.4.0 before 3.4.3; from 3.3.3 before 3.3.5; from 3.2.4 before 3.2.6; from 3.0.16 before 3.0.18 | CNA record |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCH328 siemens:scalance_xch328 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM324 siemens:scalance_xcm324 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM328 siemens:scalance_xcm328 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM332 siemens:scalance_xcm332 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) siemens:scalance_xrh334_24_v_dc_8xfo_cc (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230 V AC, 12xFO) siemens:scalance_xrm334_230_v_ac_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230 V AC, 8xFO) siemens:scalance_xrm334_230_v_ac_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_230v_ac_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24 V DC, 12xFO) siemens:scalance_xrm334_24_v_dc_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24 V DC, 8xFO) siemens:scalance_xrm334_24_v_dc_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_24v_dc_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) siemens:scalance_xrm334_2x230_v_ac_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) siemens:scalance_xrm334_2x230_v_ac_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_2x230v_ac_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SIDIS Prime siemens:sidis_prime (from the name) | before V4.0.800 | CISA ADP |
Siemens SIDIS Secured SmartPlug siemens:sidis_secured_smartplug (from the name) | before V7.26.0310 | CISA ADP |
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name) | before V5.0 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
References
- https://openssl-library.org/news/secadv/20250930.txtvendor-advisory
- https://github.com/openssl/openssl/commit/2b4ec20e47959170422922eaff25346d362dcb35patch
- https://github.com/openssl/openssl/commit/7cf21a30513c9e43c4bc3836c237cf086e194af3patch
- https://github.com/openssl/openssl/commit/bbf38c034cdabd0a13330abcc4855c866f53d2e0patch
- https://github.com/openssl/openssl/commit/89e790ac431125a4849992858490bed6b225eadfpatch
- https://github.com/openssl/openssl/commit/654dc11d23468a74fc8ea4672b702dd3feb7be4bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.