Bug 2487938 (CVE-2026-44492)

Summary: CVE-2026-44492 axios: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, abarbaro, abrianik, abuckta, adudiak, akostadi, alcohan, alizardo, amasferr, anthomas, ataylor, bbrownin, bdettelb, brasmith, cdrage, cmah, cmyers, cochase, dbosanac, dbruscin, dfreiber, dkuc, dmayorov, dnakabaa, doconnor, dranck, drow, dschmidt, dymurray, eaguilar, ebaron, eborisov, ehelms, erezende, ewittman, fdeutsch, fmariani, ggainey, ggrzybek, gmalinko, gparvin, ibolton, janstey, jbalunas, jburrell, jchui, jhe, jkoehler, jlanda, jlledo, jmatthew, jmontleo, jolong, jraez, jreimann, juwatts, jwong, jwon, kaycoth, kshier, ktsao, kvanderr, lball, lchilton, lcouzens, lphiri, mcarlett, mdessi, mhess, mhulan, mrizzi, nboldt, ngough, nipatil, nmoumoul, oaljalju, omaciel, orabin, oramraz, osousa, pahickey, pantinor, parichar, pcattana, pcreech, pdelbell, pgaikwad, pjindal, psrna, rchan, rhaigner, rhel-process-autobot, rjohnson, rkubis, rstepani, rushinde, sdawley, sdoran, sfeifer, simaishi, slucidi, smallamp, smcdonal, smullick, sseago, stcannon, stirabos, tasato, tcunning, teagle, thason, tmalecek, tsedmik, veshanka, vkumar, vle, vwilson, watson-tool-maintainers, yfang, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in Axios, a promise-based HTTP client. This vulnerability occurs because Axios does not properly normalize IPv4-mapped IPv6 addresses. When a NO_PROXY setting is configured to block direct access to specific IPv4 addresses, an attacker can bypass this restriction by using the IPv4-mapped IPv6 form of the address in a request URL. This allows the request to be routed through the proxy, potentially exposing internal services or sensitive information that should otherwise be inaccessible.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2488211, 2488213, 2488214, 2488215, 2488216, 2488219, 2488220, 2488223, 2488224, 2488212, 2488217, 2488218, 2488221    
Bug Blocks:    

Description OSIDB Bzimport 2026-06-11 17:01:19 UTC
Axios is a promise based HTTP client for the browser and Node.js. Prior to 0.32.0 and 1.16.0, Axios does not normalise IPv4-mapped IPv6 addresses. When NO_PROXY lists an IPv4 address such as 127.0.0.1 or 169.254.169.254, a request URL using the IPv4-mapped IPv6 form (::ffff:7f00:1, ::ffff:a9fe:a9fe) still routes through the configured proxy. Node.js resolves these addresses to the underlying IPv4 host, so the request reaches the internal service via the proxy rather than being blocked. This vulnerability is fixed in 0.32.0 and 1.16.0.