Bug 2467820 (CVE-2026-39820)

Summary: CVE-2026-39820 net/mail: golang: Go net/mail: Denial of Service via crafted email inputs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, abarbaro, akoudelk, alcohan, alizardo, amctagga, anjoseph, anpicker, ansmith, anthomas, aoconnor, aruklets, bbrownin, bdettelb, bniver, bparees, ckandaga, cmah, crizzo, dakwon, dhanak, dkeler, doconnor, drosa, dschmidt, dsimansk, dymurray, eaguilar, ebaron, eborisov, eglynn, ehelms, erezende, fdeutsch, flucifre, ggainey, gmeno, gparvin, groman, hasun, ibolton, jbalunas, jbritton, jcantril, jchui, jfula, jhe, jjoyce, jkoehler, jlanda, jmatthew, jmontleo, jolong, jowilson, jpasqual, jprabhak, jpretori, jschluet, juwatts, kingland, kshier, ktsao, kverlaen, lball, lbragsta, lchilton, lgamliel, lhh, lphiri, lwan, manissin, mbenjamin, mburns, mgarciac, mhackett, mhess, mhulan, mnovotny, mwringe, nboldt, ngough, nmoumoul, nyancey, oaljalju, ometelka, oramraz, osousa, pahickey, pcreech, peholase, pgaikwad, pjindal, psrna, ptisnovs, pvasanth, rchan, rekumar, rfreiman, rhaigner, rhel-process-autobot, rjohnson, rojacob, sakbas, sausingh, sbratsla, sdawley, sfeifer, simaishi, slucidi, smallamp, smcdonal, smullick, sostapov, sseago, stcannon, stirabos, suppawar, syedriko, teagle, thason, tmalecek, tzivkovi, vereddy, veshanka, vle, vvoronko, vwilson, watson-tool-maintainers, wenshen, whayutin, wtam, xdharmai, xiyuan, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the `net/mail` package of the Go programming language. An attacker could provide specially crafted inputs to the `ParseAddress`, `ParseAddressList`, or `ParseDate` functions. This could lead to excessive consumption of CPU and memory resources, resulting in a Denial of Service (DoS) for applications processing these inputs.
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Last Closed: Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-07 20:01:51 UTC
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

Comment 2 errata-xmlrpc 2026-06-01 00:43:55 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:22120 https://access.redhat.com/errata/RHSA-2026:22120

Comment 3 errata-xmlrpc 2026-06-01 01:00:38 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:22121 https://access.redhat.com/errata/RHSA-2026:22121

Comment 4 errata-xmlrpc 2026-06-01 01:04:26 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:22112 https://access.redhat.com/errata/RHSA-2026:22112