CVE-2009-0749

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-02. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Use-after-free vulnerability in the GIFReadNextExtension function in lib/pngxtern/gif/gifread.c in OptiPNG 0.6.2 and earlier allows context-dependent attackers to cause a denial of service (application crash) via a crafted GIF image that causes the realloc function to return a new pointer, which triggers memory corruption when the old pointer is accessed.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
72.2%
KEV
Not listed

Published

March 2, 2009

Last Modified

April 23, 2026

Advisory Details (8)

Auto-updated May 30, 2026
Patch available.
generic

oss-security - CVE request: optipng security release

http://www.openwall.com/lists/oss-security/2009/02/24/2
generic

OptiPNG: User-assisted execution of arbitrary code (GLSA 200903-12) — Gentoo security

http://www.gentoo.org/security/en/glsa/glsa-200903-12.xml
generic

OptiPNG / Bugs / #15 crash with particular GIF

http://sourceforge.net/tracker/index.php?func=detail&aid=2582013&group_id=151404&atid=780913
generic

About Secunia Research | Flexera

http://secunia.com/advisories/35685
generic

About Secunia Research | Flexera

http://secunia.com/advisories/34259
generic

About Secunia Research | Flexera

http://secunia.com/advisories/34201
generic

About Secunia Research | Flexera

http://secunia.com/advisories/34035
generic Patch Available

OptiPNG Home Page

http://optipng.sourceforge.net

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
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  24. 2026-06-19 07:55 UTCOSV refresh
  25. 2026-06-18 17:49 UTCEPSS rescore
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  1. 2026-06-18 17:49 UTCEPSS rescore
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  27. 2026-06-01 13:49 UTCEPSS rescore
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  29. 2026-05-31 22:28 UTCEPSS rescore
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  31. 2026-05-31 00:13 UTCEPSS rescore
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  33. 2026-05-30 17:54 UTCEG score recompute
  34. 2026-05-30 17:54 UTCGHSA enrichment
  35. 2026-05-29 13:40 UTCEPSS rescore
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  43. 2026-05-26 07:16 UTCEPSS rescore
  44. 2026-05-26 07:16 UTCEPSS rescore
  45. 2026-05-25 20:16 UTCOSV refresh
  46. 2026-05-24 16:43 UTCEPSS rescore
  47. 2026-05-22 21:15 UTCEPSS rescore
  48. 2026-05-22 21:15 UTCEPSS rescore
  49. 2026-05-20 22:37 UTCEPSS rescore
  50. 2026-05-20 22:37 UTCEPSS rescore
  51. 2026-05-20 11:21 UTCEPSS rescore
  52. 2026-05-20 11:20 UTCEPSS rescore
  53. 2026-05-18 21:29 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2009-0749?
CVE-2009-0749 is a high vulnerability published on March 2, 2009. Use-after-free vulnerability in the GIFReadNextExtension function in lib/pngxtern/gif/gifread.c in OptiPNG 0.6.2 and earlier allows context-dependent attackers to cause a denial of service (application crash) via a crafted GIF image that causes the realloc function to return a new pointer, which…
When was CVE-2009-0749 disclosed?
CVE-2009-0749 was first published in the National Vulnerability Database on March 2, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-0749 actively exploited?
CVE-2009-0749 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2009-0749?
CVE-2009-0749 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2009-0749?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-0749, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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