01 Record

CVE-2023-27043

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In

MediumPUBLISHEDCNA: mitre

CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

View raw JSON

02 Description

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

2.53% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.5% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-04-18 00:00Z3 YR AGO

Last updated

2026-05-12 10:52Z3 MO AGO

Reserved

2023-02-27

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses

CWE-20Improper Input ValidationClass
CWE-1286Improper Validation of Syntactic Correctness of InputBase

Data version

5.2

Document digest

f48e40bf4075707574cefc2fcadb49ddfe430096e2ef1bf77e7826eaafd68fdd

05 Affected products

VendorProductVersionsPlatforms

fedoraprojectfedoraNot specified—

netappactive_iq_unified_managerNot specified—

netappontap_select_deploy_administration_utilityNot specified—

pythonpythonNot specified—

redhatenterprise_linuxNot specified—

redhatopenshift_data_foundationNot specified—

redhatrhel_eusNot specified—

redhatrhel_software_collectionsNot specified—

06 References

github.comhttps://github.com/python/cpython/issues/102988
python.orghttp://python.org
python-security.readthedocs.iohttps://python-security.readthedocs.io/vuln/email-parseaddr-realname.html
security.netapp.comhttps://security.netapp.com/advisory/ntap-20230601-0003/
lists.fedoraproject.orgFEDORA-2023-88fbb78cd3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORLXS5YTKN65E2Q2NWKXMFS5FWQHRNZW/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-555b4d49b1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PHVGRKQAGANCSGFI3QMYOCIMS4IFOZA5/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-2f86a608b2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PU6Y2S5CBN5BWCBDAJFTGIBZLK3S2G3J/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-1bb427c240https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWMBD4LNHWEXRI6YVFWJMTJQUL5WOFTS/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-87771f4249https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZAEFSFZDNBNJPNOUTLG5COISGQDLMGV/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-c61a7d5227https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SINP4OVYNB2AGDYI2GS37EMW3H3F7XPZ/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-d577604e6ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZXC32CJ7TWDPJO6GY2XIQRO7JZX5FLP/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-7d223ee343https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDC2VOX7OQC6OHMYTVD4HLFZIV6PYBC/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-c0bf8c0c4ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NEUNZSZ3CVSM2QWVYH3N2XGOCDWNYUA3/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-f96ff39b59https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YQVY5C5REXWJIORJIL2FIL3ALOEJEF72/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-8085628fffhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/75DTHSTNOFFNAWHXKMDXS7EJWC6W2FUC/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-d01f8a69b4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2W2BZQIHMCKRI5FNBJERFYMS5PK6TAH/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-b245e992eahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ARI7VDSNTQVXRQFM6IK5GSSLEIYV4VZH/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-0583eedde7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SOX7BCN6YL7B3RFPEEXPIU5CMTEHJOKR/vendor-advisory
lists.fedoraproject.orgFEDORA-2024-06ff0a6defhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N6M5I6OQHJABNEYY555HUMMKX3Y4P25Z/vendor-advisory
lists.fedoraproject.orgFEDORA-2024-3ab90a5b01https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2MAICLFDDO3QVNHTZ2OCERZQ34R2PIC/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-0583eedde7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HXYVPEZUA3465AEFX5JVFVP7KIFZMF3N/vendor-advisory
lists.fedoraproject.orgFEDORA-2024-8df4ac93d7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QDRDDPDN3VFIYXJIYEABY6USX5EU66AG/vendor-advisory
lists.fedoraproject.orgFEDORA-2024-94e0390e4ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BQAKLUJMHFGVBRDPEY57BJGNCE5UUPHW/vendor-advisory
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ZAEFSFZDNBNJPNOUTLG5COISGQDLMGV/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/75DTHSTNOFFNAWHXKMDXS7EJWC6W2FUC/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PHVGRKQAGANCSGFI3QMYOCIMS4IFOZA5/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PU6Y2S5CBN5BWCBDAJFTGIBZLK3S2G3J/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QDRDDPDN3VFIYXJIYEABY6USX5EU66AG/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RDDC2VOX7OQC6OHMYTVD4HLFZIV6PYBC/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SINP4OVYNB2AGDYI2GS37EMW3H3F7XPZ/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZXC32CJ7TWDPJO6GY2XIQRO7JZX5FLP/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWMBD4LNHWEXRI6YVFWJMTJQUL5WOFTS/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YQVY5C5REXWJIORJIL2FIL3ALOEJEF72/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ARI7VDSNTQVXRQFM6IK5GSSLEIYV4VZH/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BQAKLUJMHFGVBRDPEY57BJGNCE5UUPHW/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HXYVPEZUA3465AEFX5JVFVP7KIFZMF3N/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6M5I6OQHJABNEYY555HUMMKX3Y4P25Z/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NEUNZSZ3CVSM2QWVYH3N2XGOCDWNYUA3/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORLXS5YTKN65E2Q2NWKXMFS5FWQHRNZW/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2MAICLFDDO3QVNHTZ2OCERZQ34R2PIC/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2W2BZQIHMCKRI5FNBJERFYMS5PK6TAH/
seclists.orghttp://seclists.org/fulldisclosure/2025/Apr/8
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/12/msg00000.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/11/msg00024.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-202008.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-577017.html

01 Record index

CVE-2023-27043

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-27043

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References