CVE-2026-96618
Hex exhausts memory and disk on oversized or compressed responses from an untrusted mirror
02 Description
Hex exhausts memory and disk on oversized or compressed responses from an untrusted mirror
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.35% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 29.2% of scored records. A rank, not a probability.
- NVD base score
- 2.1 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-16.
- 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
- 2026-10-12 15:29Z16 DAYS AGO
- Last updated
- 2026-10-16 17:33Z12 DAYS AGO
- Reserved
- 2026-10-10
- Assigning CNA
- EEF
- Record state
- PUBLISHED
- Severity
- Low (CVSS 2.1)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Weaknesses
- Data version
- 5.2
- Document digest
- 745bf274511620df558ef90bbb7316735877cb9099785cc4aab40fd5788b6485
05 Affected products
06 References
- github.comGitHub Advisoryhttps://github.com/hexpm/hex/security/advisories/GHSA-gf42-pg2f-63jp
- cna.erlef.orgEEF CNA record for CVE-2026-96618https://cna.erlef.org/cves/CVE-2026-96618.html
- osv.devOSV record EEF-CVE-2026-96618https://osv.dev/vulnerability/EEF-CVE-2026-96618
- github.comIntroducing commit 51ea632 in hexpm/hexhttps://github.com/hexpm/hex/commit/51ea632424fb6ea8765148f96dc25dfeb526b1f8
- github.comFix commit bb5189e in hexpm/hexhttps://github.com/hexpm/hex/commit/bb5189eade682c5fc3f98d9725973a7beb4e1deb
- github.comFix commit 0895610 in hexpm/hexhttps://github.com/hexpm/hex/commit/08956100a8283ba500a123e5539ac64d5d7e91d8
07 Remediation
Upgrade Hex to 2.5.2 or later, for example with mix local.hex. Hex then stops downloading a registry file, package, docs tarball or other file from a repository or mirror once it's larger than 16 MiB, including after decompressing a gzip-encoded response, and checks packages against the registry checksum before writing them to the package cache or unpacking a cached copy.
08 Fixed in
Debian 13
- erlang-hex No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- erlang-hex Fixed in 2.5.3-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.