CVE-2026-103242

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-89790 (ENISA EUVD) · GHSA-446c-w894-m822 (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 30, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 30, 2026
Patch available. Sources: redhat.
Red Hat

2543866 – (CVE-2026-103242) CVE-2026-103242 rpm: Heap-based buffer overflow write in hex2binv() via a mistyped RPMTAG_FILESIGNATURES header tag

https://bugzilla.redhat.com/show_bug.cgi?id=2543866
Red HatMentions a patch (unverified)

CVE-2026-103242 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-103242

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
rpm4.18.0+dfsg-1 ... 6.1.0-1 (20 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
rpm4.20.1+dfsg-3, 6.0.0-1, 6.0.0-2, 6.0.1-1, 6.1.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
rpm4.20.1+dfsg-3, 6.0.0-1, 6.0.0-2, 6.0.1-1, 6.1.0-1
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 80× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-30 12:36 UTCEG score recompute
  4. 2026-10-30 12:36 UTCVendor advisory
  5. 2026-10-30 12:36 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-27 11:33 UTCEG score recompute
  10. 2026-10-27 11:33 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-25 14:56 UTCEG score recompute
  14. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-18 05:09 UTCEG score recompute
  21. 2026-10-17 19:45 UTCEG score recompute
  22. 2026-10-17 19:45 UTCVendor advisory
  23. 2026-10-17 19:45 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 71 more
  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-12 16:40 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-12 01:26 UTCVendor advisory
  6. 2026-10-12 01:26 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  7. 2026-10-11 20:15 UTCEG score recompute
  8. 2026-10-11 18:28 UTCEG score recompute
  9. 2026-10-11 15:01 UTCEG score recompute
  10. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-11 12:33 UTCEG score recompute
  12. 2026-10-11 12:33 UTCVendor advisory
  13. 2026-10-11 12:33 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-10 23:30 UTCEG score recompute
  15. 2026-10-10 23:30 UTCVendor advisory
  16. 2026-10-10 23:30 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  17. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-10 10:36 UTCVendor advisory
  19. 2026-10-10 10:36 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  20. 2026-10-09 21:42 UTCEG score recompute
  21. 2026-10-09 21:42 UTCVendor advisory
  22. 2026-10-09 21:42 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  23. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-09 08:48 UTCVendor advisory
  25. 2026-10-09 08:48 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  26. 2026-10-08 19:47 UTCEG score recompute
  27. 2026-10-08 19:47 UTCVendor advisory
  28. 2026-10-08 19:47 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  29. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  30. 2026-10-08 06:21 UTCVendor advisory
  31. 2026-10-08 06:21 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  32. 2026-10-07 17:28 UTCVendor advisory
  33. 2026-10-07 17:28 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  34. 2026-10-07 04:32 UTCVendor advisory
  35. 2026-10-07 04:32 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  36. 2026-10-06 15:38 UTCEG score recompute
  37. 2026-10-06 15:38 UTCVendor advisory
  38. 2026-10-06 15:38 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  39. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  40. 2026-10-06 02:20 UTCEG score recompute
  41. 2026-10-06 02:20 UTCVendor advisory
  42. 2026-10-06 02:20 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  43. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-10-05 13:26 UTCVendor advisory
  45. 2026-10-05 13:26 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  46. 2026-10-05 00:34 UTCEG score recompute
  47. 2026-10-05 00:34 UTCVendor advisory
  48. 2026-10-05 00:34 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  49. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  50. 2026-10-04 11:41 UTCVendor advisory
  51. 2026-10-04 11:41 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  52. 2026-10-03 22:48 UTCEG score recompute
  53. 2026-10-03 22:48 UTCVendor advisory
  54. 2026-10-03 22:48 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  55. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-10-03 09:55 UTCVendor advisory
  57. 2026-10-03 09:54 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  58. 2026-10-02 20:59 UTCEG score recompute
  59. 2026-10-02 20:59 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  60. 2026-10-02 08:06 UTCEG score recompute
  61. 2026-10-02 08:06 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  62. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  63. 2026-10-01 19:13 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  64. 2026-10-01 06:18 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  65. 2026-09-30 17:25 UTCEG score recompute
  66. 2026-09-30 17:25 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  67. 2026-09-30 16:41 UTCEG score recompute
  68. 2026-09-30 16:41 UTCGHSA enrichmentGHSA-446c-w894-m822 · GitHub severity HIGH · GitHub CVSS 7.1
  69. 2026-09-30 12:21 UTCEG score recompute
  70. 2026-09-30 11:58 UTCEG score recomputeFirst assessed: 7.1 HIGH
  71. 2026-09-30 11:57 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-103242?
CVE-2026-103242 is a high-severity vulnerability; its CVE record was published on September 30, 2026. A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen…
When was CVE-2026-103242 made public?
CVE-2026-103242 was made public on September 30, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 30, 2026. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-103242 actively exploited?
CVE-2026-103242 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103242?
CVE-2026-103242 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103242?
A fix for CVE-2026-103242 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103242 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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